If President Obama and Mitt Romney were to face off in the presidential election today, the race would almost be too close to call. According to the latest Rasmussen Reports poll of U.S. voters, each contestant claims 42 percent of the vote. Half of the remaining 16 percent of voters would prefer someone else, while the other half is undecided. The tie actually marks a dip for Romney, who held a 45 to 39 percent lead over the president just last week—the largest lead over Obama held by a Republican challenger so far. Almost all weekly surveys since May have found a generic GOP candidate leading over Obama, but so far Romney has been the only Republican candidate to garner more support than the president in more than one survey.