Republican Marco Rubio and Democrat Patrick Murphy might cruise to primary victories in Florida's U.S. Senate race Tuesday, a new poll suggests, but they will be locked in a much tighter contest for the November general election.
The Mason-Dixon Polling & Research survey shows Rubio, the incumbent senator, romping primary challenger Carlos Beruff by 61-22 percent. Murphy, a Jupiter congressman, leads Orlando Rep. Alan Grayson by a commanding 55-22 percent.
But in a general-election match-up, Rubio is ahead of Murphy by 46-43 percent -- a virtual tie, given the poll's error margin of 4 percentage points. Rubio leads among Republicans, independents, men, whites and Hispanics. Murphy is ahead among Democrats, women and African-Americans.
Mason-Dixon polled 625 registered voters by phone from Aug. 22-24. The error margin for the primary numbers -- obtained by oversampling 400 likely Democratic voters and 400 likely Republican voters -- is 5 percentage points.