With the South Carolina Republican primary rapidly approaching, the candidates are bringing in the big guns to help them make their last minute case to voters. Jeb Bush has been counting on former President George W. Bush, to rescue his floundering campaign. Jeb’s big brother cut a radio ad, appeared in an spot from his super PAC, Right to Rise, and the pair have campaigned together in the Palmetto State. John Kasich has relied on Newt Gingrich, winner of the South Carolina primary in 2012. Marco Rubio has received support from Trey Gowdy, the South Carolina Congressman and Chair of the House Select Committee investigating Benghazi. But South Carolina Gov. Nikki Haley’s last-minute endorsement of Marco Rubio is attracting the most headlines. Although Haley’s State of the Union response upset some for her criticism of Donald Trump, it also earned her bipartisan praise (and was certainly a better performance than Rubio’s own attempt). Gov. Haley also acquitted herself well during the Confederate Flag debate in the state last summer. Less than a day before Haley delivered her support to Rubio, Jeb Bush touted her potential impact on the race, “She is the probably the most meaningful endorsement if there is, if she is going to give an endorsement it would be the most powerful meaningful one in the state.” Rubio’s campaign quickly produced an ad to capitalize on Haley’s endorsement. The ad features the governor speaking directly to the camera, “America can’t afford four more years like the last eight. That’s why I’m endorsing Marco Rubio for President.” Haley claims, “As the wife of a combat veteran, I know Marco will keep America safe.” Emphasizing Rubio’s youth, as has been a central message of his campaign, Haley concludes, “I’m endorsing Marco because this election is about the future – and the future is now.” Already, Republicans are excited about the possibility of a presidential ticket pairing the 44-year old Cuban American Rubio and the 44-year old Indian American Haley as a way to cut into the Democratic Party’s advantages with young and minority voters. But with Donald Trump still leading in the polls, and Rubio trailing Ted Cruz, Haley’s endorsement may be too little, too late. Haley’s endorsement – and this ad – may help Rubio hold off Bush and Kasich as the Republican establishment’s preferred choice. However, it remains to be seen if a 3-5-3 start will be enough to carry Rubio to the nomination.