Will Hurd, a former Texas congressman who was part of a diminishing bloc of Republican moderates in the House and was the only Black member of his caucus when he left office in 2021, announced his candidacy for president on Thursday with a video message that attacked the G.O.P. front-runner, Donald J. Trump.
“If we nominate a lawless, selfish, failed politician like Donald Trump, who lost the House, the Senate and the White House, we all…