Hillary Clinton put pressure on Donald Trump by announcing that she will participate in the three scheduled presidential debates this fall, challenging her Republican rival to do the same.Clinton "looks forward to participating in all three presidential debates," John Podesta, the Clinton campaign chairman, said in a statement released Monday night,"The only issue now is whether Donald Trump is going to show up," Podesta said.Trump skipped a debate during the GOP primary in January, and there’s some speculation that he may do so again., there are serious doubts from both Republican and Democratic sources about whether Trump will agree to attend. Trump sources either didn’t respond or deflected the question when asked for comment.Although formal invitations haven’t been sent, Trump has already complained about the debate schedule, which currently has two of the three events on the same nights as televised National Football League games. He and the Republican National Committee have called for new dates, but the bipartisan commission that determined the dates and places claims scheduling conflicts are common and unavoidable."We would like the debates to not be head-to-head against major NFL games. That's something we'll be discussing as we go into negotiations," Jason Miller, a Trump campaign senior communications adviser, said on CNN’s"We think it's only right that as many people are able to watch the debates as possible."The commission responded by saying they believe "the dates for the 2016 debates will serve the American public well."But Trump continued to bemoan the decision, even claiming he received a letter from the NFL, which the league has denied.