Trump backs former critic Sununu in high-stakes swing state Senate race

President Donald Trump on Sunday endorsed former Sen. John E. Sununu of New Hampshire, a longtime GOP Trump critic, over one of his first-term ambassadors, former Sen. Scott Brown, in a crucial Senate race that's one of a handful that may determine the Senate majority in the midterm elections.

Sununu, who was praised by Trump as an "America First Patriot" who "will work tirelessly to advance our America First Agenda," is seen by top Senate Republicans as the strongest candidate to flip the seat held by longtime Democratic Sen.