President Joe Biden mocked Donald Trump’s courtroom travails in a newly issued debate challenge. The president called on his Republican challenger to join him for two televised debates in June and September, well before early voting begins, in a video message and letter sent to the bipartisan Commission on Presidential Debates. “Donald Trump lost two debates to me in 2020, and since then he hasn’t shown up for a debate,” Biden said in the video message. “Now he is acting like he wants to debate me again. Well, make my day, pal. I’ll even do it twice.” Want more breaking political news? Click f…