Three new Quinnipiac polls tested U.S. Senate match ups in key swing states:
In Florida, Sen. Marco Rubio (R) leads Rep. Patrick Murphy (D) 47% to 40% and tops Rep. Alan Grayson (D) 48% to 40%. Murphy and Grayson are ahead of several largely unknown Republican contenders.
In Ohio, Sen. Rob Portman (R) ties Ted Strickland (D) 42% to 42%.
In Pennsylvania, Sen. Pat Toomey (R) leads Katie McGinty (D) 49% to 40%.


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