BREAKING NEWS from CNN: Florida Gov. Ron DeSantis, who entered the Republican presidential primary as Donald Trump’s greatest threat, announced Sunday he is ending his White House bid nearly a week after his underwhelming performance in Iowa.

It’s a devastating blow to the promising career of a once-rising GOP star, and his failure to reach the lofty expectation of his candidacy has already sparked a wave of second-guessing from close allies and advisers. Some believe DeSantis took too long to attack Trump. Others think his team underestimated former South Carolina Gov. Nikki Haley.

More remain convinced that there was nothing DeSantis could have done to wrestle the party from Trump’s loyal and sizable followers.

DeSantis formally ended his campaign and endorsed Trump for president.