Donald Trump on Monday seemed to back away from his earlier commitment to debate Vice President Kamala Harris, questioning the value of a meetup and saying he “probably” will debate but he “can also make a case for not doing it.” Trump, in an interview with Fox News Channel that aired Monday night, was pressed several times about committing to debating Harris before giving a squishier answer than he had in recent days. The Republican former president had been eager to debate President Joe Biden when he was the Democratic nominee after months of suggesting that Biden was not mentally up for the matchup — or the presidency.