Kamala Harris was set up “to fail” by President Joe Biden’s refusal to clear the way for a Democratic primary and instead pass the torch to his vice president with just over 100 days to pitch herself to the American public, one expert said Friday night on “Overtime” with “Real Time” host Bill Maher. “When Biden refused to step aside and not run again, he was supposed to be that bridge, he backed off on that promise due to arrogance and then he drops out after a catastrophic debate performance and they set Kamala Harris up to fail,” said Sarah Isgur, a senior editor at The Dispatch and former d…