During last week's dueling town hall events, Biden claimed to have the support of the Boilmakers union. That came after host George Stephanopoulos brought up Biden's new claim that he doesn't want to ban fracking, while quoting a Boilermakers Local 154 member who told the New York Times that this is inconsistent with Biden's goal of ending use of fossil fuels. Biden responded "The Boilermakers overwhelmingly endorse me, OK?. So the Boilermakers union has endorsed me because I sat down with them, went into great detail with leadership, exactly what I would do, No. 1."
Perhaps Biden sat down when them, and perhaps he went into great detail with the union's leadership. But they did not endorse him.
Sadly with Biden it's impossible to know if he was simply lying, or misremembering. Regardless, the union is pushing back on Biden's easily debunked claim.