05/10/2012 08:42 am ET Updated May 10, 2012

Obama, Mitt Romney Tied In Ohio, Quinnipiac Poll Shows

President Barack Obama and presumptive GOP presidential nominee Mitt Romney are virtually tied in the key swing state of Ohio, according to a poll released Thursday by Quinnipiac University.

Obama has an indistinguishable 45-44 edge, according to the poll. When voters are asked whether they would vote for an Obama-Biden ticket or a ticket with Romney and Sen. Rob Portman (R-Ohio), who many speculate will be Romney's vice presidential nominee, the two are still tied at 45-45.

In a poll on Feb. 15, the firm had Obama up 46-44 over Romney, and with the addition of vice presidents, he was up 47-43.

Other recent polls in Ohio have shown Obama with a slightly larger edge. The state has voted for the winner in every presidential election since 1960.

There remains a substantial gender gap in Ohio polling, with men voting 50-40 for Romney and women voting 49-38 for Obama.