President Joe Biden followed through on Friday on his vow to veto a Republican-backed measure that would have repealed a U.S. labor board rule treating companies as the employers of many of their contract and franchise workers and requiring them to bargain with those workers' unions. The proposal to repeal the National Labor Relations Board rule passed Congress narrowly and it is unlikely Republicans can muster the two-thirds majority to override the veto by Biden, a Democrat. In a memo to lawma