ATLANTA: Republican presidential nominee Donald Trump proposed to debate Democratic US Vice President Kamala Harris on Fox News on Sept. 4, but the Harris campaign countered that Trump was trying to back out of a debate that had been set to run on ABC. The rules would be similar to the first debate with President Joe Biden, who has since dropped his reelection bid, Trump said in a post on Truth Social late on Friday. But this time it would have a “full arena audience” and take place in the battleground state of Pennsylvania, Trump said.