The US president said Romney even raised fees in Massachusetts on obtaining a birth certificate, “which would have been expensive for me.”
It was a veiled reference to opponents of the US president who have incorrectly said he was born outside the US.
Both sides acknowledge that Obama has a larger campaign organization on the ground in most states and that Democrats have an edge in the push to get supporters to the polls early.
Obama advisers insist the US president is leading or tied in all nine of those states, though strategists in both parties say North Carolina has shifted toward Romney in recent days. Romney aides insist that state-based polling underestimates the former Massachusetts governor’s popularity with independents.
Obama aides say they expect the demographics of the electorate to look similar to the 2008 election, with slight increases in black and Hispanic voters.
While Romney and Obama are deadlocked in national polls, there were signs that the burst of momentum Romney got from the debates had waned in Ohio, Virginia and elsewhere. Because Obama starts with more states and votes solidly in his expected win column, Romney’s team has fewer ways to reach the 270 electoral votes.