South Carolina Gov. Nikki Haley (R) has endorsed Sen. Marco Rubio (R-FL) for president.

The State reports that Haley was looking hard at endorsing an establishment candidate, choosing between Rubio and former Florida Gov. Jeb Bush (R). She eventually went with Rubio since Bush has been behind in the polls. She is the third prominent South Carolina Republican to endorse Rubio, along with Sen. Tim Scott (R-SC) and Rep. Trey Gowdy (R-SC).

Haley previously endorsed eventual GOP presidential nominee Mitt Romney in 2012, who got creamed by former Speaker of the House Newt Gingrich in the 2012 South Carolina primary. She also angered a lot of conservatives by lecturing them to resist "the angriest voices" on immigration in her response to President Barack Obama's State of the Union address.

"No one who is willing to work hard, abide by our laws, and love our traditions should ever feel unwelcome in this country," Haley said. "I have no doubt that if we act with proper focus, we can protect our borders, our sovereignty and our citizens, all while remaining true to America’s noblest legacies."

Yet Haley did not attack Obama.

The Daily Wire's Ben Shapiro wrote at the time:

So why didn’t Haley focus on Obama and Hillary, and the system of immigration they have championed? Why didn’t she focus on their unwillingness to keep us safe? Because, she said, a full-scale attack on Obama was “not me.”

And it’s not the GOP either. Which is why the GOP continues to lose. Donald Trump is not the chief opponent of American greatness. He’s a loudmouth braggart without political principle and with an outrageous sense of the appropriate. But Barack Obama and Hillary Clinton are ideological leftists determined to cripple America as we knew her, and replace her with a utopian European vision. So long as the Republicans see Trump rather than Hillary and Obama as the problem, they deserve to lose.

Haley also said on Tuesday she views Trump as "everything a governor doesn't want in a president" and that the businessman is "quite Obama-like." She also viewed Trump channeling Michael Moore and Code Pink as "embarrassing."

Oddly enough, back in January Haley said that she disagreed with Rubio on amnesty, which she based on her opposition to the disastrous Gang of Eight bill. It appears that Haley put higher stock in a vice presidential slot rather than remaining strong on conservative principles.