A Republican strategist’s attempt to blame former President Donald Trump’s disastrous debate performance on ABC News moderators and defend his mental faculties blew up in face on CNN Friday morning. Conservative Scott Jennings fielded tough questions from anchor Jim Acosta about Trump’s decision to “back down” from a second debate against Vice President Kamala Harris — and his repetition of strange conspiracy theories — as panelist Paul Begala, a liberal political commentator, looked on with a wide smile. “If he agreed to another debate, it is entirely likely that the moderators would be even …