By Richard Cowan, Moira Warburton and Sarah N. Lynch WASHINGTON (Reuters) -At least five congressional Republican allies of Donald Trump sought White House pardons after supporting his attempts to overturn his 2020 election defeat, witnesses on Thursday told the U.S. House of Representatives probe into the Jan. 6, 2021, assault on the Capitol. Their names emerged at the end of a fifth day of hearings that focused on how the then-president pressured top Justice Department officials daily in his final weeks in office to help him illegally hold onto power. Trump sought to replace Acting Attorney …