By David Edwards Republican U.S. Senate candidate Herschel Walker of Georgia lashed out at former President Barack Obama for living in a “nice mansion.” During an interview on Fox News, host Maria Bartiromo asked Walker to respond to Obama’s claim that the former running back is not ready to be a U.S. senator. “How would you answer President Obama?” Bartiromo wondered. “What’s your answer to Obama?” “Well, my answer to Obama [is] he got it wrong when he told us to vote for Joe Biden,” Walker replied. “And where has he been all this time? He’s been in his nice mansion doing whatever he was doin…