Vice President Kamala Harris has signaled her approval of three possible dates to debate former President Donald Trump’s new running mate, Sen. J.D. Vance (R-OH). But the Trump campaign has not yet backed any of the debates, with senior adviser Brian Hughes putting out the statement, “We don’t know who the Democrat nominee for Vice President is going to be, so we can’t lock in a date before their convention. To do so would be unfair to Gavin Newsom, JB Pritzker, Gretchen Whitmer, or whoever Kamala Harris picks as her running mate.” This is a reference to the current controversy of some Democra…