Donald Trump says he only agreed to debate President Joe Biden, and not Vice President Kamala Harris, on ABC, but the terms of the actual debate agreement didn’t make that specification, according to one pollster. Trump over the weekend declared his refusal to debate Harris, who has now clinched the Democratic nomination, on the network, saying he would instead insist on a Fox News debate with an audience. For her part, Harris has said she will show up at the previously agreed debate, whether the former president attends or not. Trump claims Biden’s decision to drop out warrants a new negotiat…