Politico reports:

New Mexico Gov. Susana Martinez on Thursday will endorse Marco Rubio for the GOP nomination, giving the Florida senator a badly needed piece of good news during a rough period of his campaign.

“Marco Rubio is a compelling leader who can unite the country around conservative principles that will improve the lives of all Americans,” she said in a statement. “The stakes for our great country are too high — and the differences between the candidates too great — for me to remain neutral in this race. I wholeheartedly trust Marco to keep us safe and ensure a better tomorrow.”

The rest here.

Martinez has been critical of GOP front-runner Donald Trump in the past:

And she’s reportedly not committing to vote for Trump if he’s the nominee even though she’s chairwoman of the Republican Governors Association:

However, she’s not the “rising star” she once was: