When choosing between candidates, voters have to select one bundle of beliefs and behaviors or another. It’s a combo plate. No substitutions allowed.
Maybe Trump’s supporters backed him because they don’t believe the allegations made against him. Or maybe they supported him in spite of finding those claims credible. (They heard him admit to grabbing women “by the p—y” on tape, after all.)
In any case, by arguing that victory refutes all allegations against Trump, Republicans are laying the groundwork to welcome Moore to Washington if he wins next month.