(The Center Square) – The Republican and Democratic presidential candidates will face off in a debate Tuesday evening, possibly the only one between the two, raising the stakes in what remains an incredibly tight race. Vice President Kamala Harris and former President Donald Trump agreed to the terms of the Tuesday debate, hosted at the the National Constitution Center in Philadelphia and moderated by ABC News anchors David Muir and Linsey Davis. The debate rules will be similar to Trump’s June debate with President Joe Biden, a debate that proved fatal to the incumbent’s reelection hopes. The…