Carly Fiorina endorsed Republican presidential candidate Sen. Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE (Texas) at a Miami rally on Wednesday, praising him as a political outsider.

"Ted Cruz has always been a constitutional conservative," the former Hewlett-Packard CEO said, describing Cruz as "a fearless fighter and reformer."

ADVERTISEMENT

Fiorina ended her own White House bid in mid-February after a poor showing in early-voting states.

Her campaign was known for her harsh criticism of Democratic presidential front-runner Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE.

"The truth is that Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE and Hillary Clinton are two sides of the same coin," Fiorina said Wednesday, ripping the GOP front-runner.

"They aren't going to reform the system. They are the system."

Fiorina noted that many in the Republican Party are "horrified by Donald Trump."

"I'm one of them," she added, describing Cruz as "the only guy who can beat Donald Trump."

"Ted Cruz has always been a constitutional conservative," Fiorina said, adding that he "didn’t care if he got invited to the cocktail parties in D.C."

Cruz complimented Fiorina as an "incredible business leader" in a press conference shortly after the endorsement.

"Her campaign for president impressed people all over this country, with her intelligence, knowledge, expertise ... with her ability to champion common sense conservative principles," Cruz said.

He pointed to Fiorina's support as "one more manifestation of what has been played out, as the one campaign that has demonstrated that can and repeatedly has beaten Donald Trump."

Cruz reiterated that rivals Marco Rubio Marco Antonio RubioFlorida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings MORE and John Kasich should "prayerfully reflect" and consider coalescing behind his campaign so he can go head-to-head with the front-runner.

Both candidates are pinning their hopes on their home states, which hold their winner-take-all contests on March 15.

"If you want to stop Donald Trump ... unify behind our campaign," Cruz said, adding that Republicans "don’t want to hand the election to Hillary Clinton on a silver platter" in November.

Her endorsement comes the day after Cruz's primary victory in Idaho. But Trump swept up most of the states Tuesday night, including Mississippi, dealing a blow to the Texas senator in an important Southern state.

This brings Cruz's total number of states won to seven, while Trump has 15. Rubio lags far behind with only one victory in Minnesota, as well as the territory of Puerto Rico.

While Cruz still trails Trump in the overall delegate count, his victory in Idaho gives him bragging rights as the only candidate to best the GOP front-runner on Tuesday.

Cruz continues to position himself as the viable alternative to Trump and has called on his fellow GOP rivals to coalesce behind him.

Fiorina spoke about the GOP pushing for comprehensive immigration reform and trying not to "rock the boat" by shying away from social issues after failing to win the White House in 2012.

"It is time now to unite behind the one man who can beat Donald Trump, who can beat Hillary Clinton, who can beat the D.C. cartel. It is time to unite behind Ted Cruz," Fiorina said to roaring cheers.

Fiorina's support provides Cruz a feisty surrogate, who captured the spotlight in early debates by knocking Clinton and going after Planned Parenthood.

Fiorina, who mostly shied away from criticizing Cruz directly while she was in the GOP race, did accuse the Texas senator in January of saying "whatever he needs to say to get elected."

— Last updated at 12:28 p.m.