There's another interesting wrinkle in President Obama's trip to Pennsylvania today. The Morning Call reports that Sen. Arlen Specter (D) has joined Obama on Air Force One for the flight to Pittsburgh, just weeks after he was curiously absent from the state when the Republican-turned-Democrat could have used his support in the primary.

As for the winner of that primary, Rep. Joe Sestak (D) -- he will not be at the event today. The White House typically invites all statewide officeholders and local representatives; Sestak represents a Philadelphia-area seat. No doubt he could have attended if he wanted, though, but he likely will keep his distance from all things White House amid continuing questions about a deal offered last year in an effort to convince him to drop his primary challenge.

Former Florida GOP Chairman Jim Greer was arrested this morning on unknown charges, though the Orlando Sentinel cites a source claiming it's for grand theft, fraud and money laundering "for his role overseeing state Republican spending."

Greer announced his resignation as chairman Jan. 5, just days before the state party's annual meeting -- during which he expected to be embarrassed by certain factions. Hand-picked by Gov. Charlie Crist to lead the party, Greer cited the divide betweeen the moderate and conservative wings of the party as the reason for his leaving.

However, Greer was effectively pushed out after complaints about his misappropriation of the party's money.

President Obama's trip to Pittsburgh today was meant to be for a speech on the economy. But the White House has sent excerpts of his prepared remarks to reporters that include an acknowledgment of the continuing tragedy in the Gulf, which he will say "may prove to be a result of human error – or corporations taking dangerous short-cuts that compromised safety." More:

"We have to acknowledge that there are inherent risks to drilling four miles beneath the surface of the Earth – risks that are bound to increase the harder oil extraction becomes. Just like we have to acknowledge that an America run solely on fossil fuels should not be the vision we have for our children and grandchildren.

…The time has come, once and for all, for this nation to fully embrace a clean energy future. That means continuing our unprecedented effort to make everything from our homes and businesses to our cars and trucks more energy efficient. It means tapping into our natural gas reserves, and moving ahead with our plan to expand our nation's fleet of nuclear power plants. And it means rolling back billions of dollars in tax breaks to oil companies so we can prioritize investments in clean energy research and development.

But the only way the transition to clean energy will succeed is if the private sector is fully invested in this future – if capital comes off the sidelines and the ingenuity of our entrepreneurs is unleashed. And the only way to do that is by finally putting a price on carbon pollution.

…The House of Representatives has already passed a comprehensive energy and climate bill, and there is currently a plan in the Senate – a plan that was developed with ideas from Democrats and Republicans – that would achieve the same goals. The votes may not be there right now, but I intend to find them in the coming months. I will make the case for a clean energy future wherever I can, and I will work with anyone from either party to get this done. But we will get this done. The next generation will not be held hostage to energy sources from the last century. We will not move back. America will move forward."

In light of last night's convincing primary victory for Dona Ana County District Attorney Susana Martinez, RCP has moved the New Mexico Governor's race to Tossup.  Martinez trails Lieutenant Governor Diane Denish by three points in the RCP Average, but has surged in the most recent polling.  This sets up an interesting dynamic for the fall.  New Mexico has long been the most heavily Democratic of the Mountain West states, owing in no small part to the fact that it is among the most heavily Hispanic, but Martinez will be a Republican running with an Hispanic surname in a good Republican year.  Regardless of who wins, New Mexico will get its first female Governor in 2011.

A Rasmussen poll conducted immediately after the May 18 primary showed a whopping 25-point lead for Republican nominee Rand Paul. The pollster finds the race much closer now in a new survey
conducted June 1 (500 LVs, MoE +/- 4.5%).

General Election Matchup
Paul (R) 49 (-10 vs. last poll)
Conway (D) 41 (+7)
Und 6 (+3)

The finding is far closer to a pre-primary survey that showed Paul leading Attorney General Jack Conway 47-38. Paul's post-debate interviews and the controversy over his comments on the Civil Rights Act surely had an impact; 73 percent of respondents said they followed the news, including 39 percent who said they followed it "very closely."

RCP classifies the race as Lean Republican.

There are no clear favorites in either party as Maine voters are set to head to the polls next Tuesday to choose nominees for governor. A Pan Atlantic SMS Group Omnibus Poll found nearly half of Republicans and a stunning three-of-five Democrats undecided on their choice.

Democratic Primary Election Matchup
Mitchell 13
Rowe 12
Scarcelli 7
McGowan 6
Und 62

Republican Primary Election Matchup
Otten 17
LePage 10
Mills 8
Abbott 8
Beardsley 4
Poliquin 3
Jacobson 2
Und 47

Democrat John Baldacci is term-limited, creating the free-for-all. The two leaders, if you can call them leaders, are state Senate President Libby Mitchell (D) and energy executive Les Otten (R).

The survey of 300 likely Democratic primary voters and 300 likely Republican primary voters was conducted May 21-29, and has a margin of error of +/- 5.7 percent.

One of next Tuesday's major storylines will be whether an unsubstantiated claim of marital infidelity by a South Carolina political blogger involving state Rep. Nikki Haley (R) will derail her gubernatorial bid. In its most direct response yet, Haley's campaign has launched a new campaign ad featuring the candidate introducing her husband to voters, while claiming to have seen "the dark side of our state's politics."

Haley also addressed the allegation of conservative blogger Will Folks, a former aide to Gov. Mark Sanford (R), during a debate last night, saying it would not be a distraction.

“The questions raised about my personal life aren't true,” she said, according to The State.

Polling continues to show Haley leading her three main rivals -- Attorney General Henry McMaster, Rep. Gresham Barrett, and Lt. Gov. Andre Bauer.

On Politics Nation, Mike Memoli and Kyle Trygstad review the results from last night's primaries in Alabama, Mississippi and New Mexico.

On RCP, former Deputy Undersecretary of Defense Jed Babbin writes about Iran's efforts to deter Israel from attacking its nuclear facilities. Also, Jeremy Lott comments on Chicago's strict gun ownership rules, and former New York City Mayor Ed Koch argues against amnesty for illegal immigrants.

On RCM, Steven Malanga writes about suspect fiscal maneuverings by state, local and national politicians. Christine Nikol argues that CEOs like Tony Hayward and Lloyd Blankfein need to take more accountability for their company's problems.

Finally, on RCS, Tim Joyce argues that Roger Federer will have to adjust his game if he hopes to win Wimbledon and continue dominating the tennis world.

South Carolina Sen. Lindsey Graham isn't up for re-election again until 2014, but a new Public Policy Polling survey finds he's already in trouble among his own party. Just 40% of likely Republican voters in next week's primary approve of the job Graham is doing in the Senate, as 45% disapprove.

Comparatively, the state's junior senator, Jim DeMint, scores a 67% job approval rating among Republicans.

Graham receives far more support from those who consider themselves moderate Republicans, while just a third of the 74% of party members calling themselves conservative approve of his job performance.

"It's a good thing for Lindsey Graham that he's not up for election again until 2014," said PPP president Dean Debnam. "This is not a good climate for Republicans who have attempted to be bipartisan to be running in."

The survey was conducted of 638 likely primary voters from May 22-23 with a MoE of +/- 3.9%.

Alabama Rep. Parker Griffith's attempt for re-election as a Republican is over. Disaffected from the Nancy Pelosi-led Democrats, the freshman switched parties six months ago. Now he's the second incumbent in as many weeks to be defeated in a primary after switching parties, following in Pennsylvania Sen. Arlen Specter's (D) footsteps.

Griffith had been welcomed with open arms by House Republican leaders, but not by his 5th district Republican constituents who opted for Madison County Commissioner Mo Brooks. Griffith won just 33 percent of the vote to Brooks's 51 percent.

For more on this race and others from Tuesday's primaries, click over to our write-up on Politics Nation.