A new poll finds that 2012 GOP presidential nominee Mitt Romney would beat President Obama if the election were held today.

The Washington Post/ABC News poll released on Tuesday finds Romney would win registered voters by 49 to 45 percent. Among all Americans, the two are tied at 47 percent each.

President Obama won reelection in 2012, beating Romney by 51 to 47 percent.

But Obama's second term has been dragged down by the troubled rollout of his signature health care reform law, with the poll finding him at his lowest approval ratings and opposition to Obamacare at highs.

Obama’s approval rating is down to 42 percent, a drop of 6 points in the last month. His disapproval rating is at 55, the highest mark of his presidency.

Nearly two-thirds, at 63 percent, say they disapprove of his handling of the Obamacare rollout. Overall, the public opposes the law at a 57- to 40-percent split.

The poll was conducted from Nov. 14 to 17 and has a 3.5 percent margin of error.