Romney leads the pack of GOP VP contenders, according to the Politico:

In a surprise to many Republican insiders, former Massachusetts Gov. Mitt Romney is at the top of the vice presidential prospect list for John McCain. But lack of personal chemistry could derail the pick.

"Romney as favorite" is the hot buzz in Republican circles, and top party advisers said the case is compelling.

Campaign insiders say McCain plans to name his running mate very shortly after Barack Obama does, as part of what one campaign planner called a "bounce-mitigation strategy."

The Democratic convention is in late August, a week ahead of the Republican convention. That means McCain can size up the opposing ticket before locking in his own.

Among Romney's selling points, the article notes his "presidential" looks, his Michigan roots, and, yes, his money-raising capabilities. However, it also notes that McCain "remains less than enamored with Romney"--a point that, if true, could leave a whole lot of room for the other reported "top tier" contenders:

-- Rob Portman, a former congressman from Ohio, member of House leadership, U.S. trade ambassador and White House budget director.

-- Sen. John Thune (R-S.D.), who would delight conservatives and is at the top of the list of the party's prospects for the presidential race in 2012 or 2016. He was described to Politico by a McCain confidant as a possible "compromise" if the senator can't stomach picking Romney.

"Can't stomach"? "Less than enamored"? Doesn't sound too promising--but stranger things have happened.