Published: Jul 25, 2012 7:29 AM EDT
Updated: Jul 25, 2012 11:21 AM EDT

WASHINGTON (AP) - Senators on Capitol Hill plan to vote today on a $250 billion Democratic bill that would extend expiring tax cuts next year for all but the highest earners.
 
But Democrats don't have the 60 votes needed to advance the proposal.
 
And it's unlikely that the Senate also would vote on a rival GOP plan that includes the best-off Americans in the tax reductions.