With just 29% of likely Republican primary voters approving of his job performance, Gov. Charlie Crist's Senate campaign appears on the verge of defeat. A new Public Policy Polling survey finds Marco Rubio leading Crist in the primary by 32 points -- a stunning collapse of a candidate many assumed a year ago would be serving in the Senate in 2011.

Rubio's campaign is boosted significantly by his support among conservatives, who favor him by a 71%-17% margin. Crist wins among moderates, 49%-36%.

Rubio 60
Crist 28
Und 12

Rubio leads by 16.8 points in the RCP Average

The survey was conducted March 5-8 of 492 GOP LV with a MoE of +/- 4.4%.

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