After winning the New Hampshire primary, former president Donald J. Trump has gained the support of many Republicans in Congress, who are now falling in line behind him. Senator John Cornan, Republican of Texas, endorsed former president Trump after initially doubting his staying power. Representative Marjorie Taylor Greene, a diehard ally of Trump, is urging all Republicans to support the former president. More than half of the Senate Republicans have endorsed Trump. While his only remaining challenger, former governor Nikki Haley struggles to gain support. Vulnerable House Republicans who represent districts won by President Biden are quickly aligning themselves with Trump and his MAGA loving colleagues. The growing support for Trump among Republicans could impact the legislative agenda, particularly on issues like border security and aid to Ukraine. Resistance to Trump's candidacy is melting away in the Senate, with lawmakers like Senator John Cornan and Senator John Thune acknowledging his commanding position.