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.” ALSO READ: My Mother’s Day gift to my mom:…