By Patricia Zengerle and Richard Cowan WASHINGTON (Reuters) -U.S. lawmakers accused then-President Donald Trump on Tuesday of inciting a mob of followers to attack the U.S. Capitol on Jan. 6, 2021, in a last-ditch bid to remain in power as Congress was formally certifying his election loss. Members of a House of Representatives select committee investigating the attack said Trump had been told by advisers in his administration and his campaign that he had lost the 2020 presidential election and should concede to Joe Biden, but he chose to disregard their advice. In video testimony, witnesses d…