Haley, who has endorsed Marco Rubio as presidential nominee asserted that the Florida Senator is the right person to defeat the Democratic presidential nominee and lead the country.
Rubio, who has emerged as the GOP's establishment candidate is campaigning in this important state of Virginia, hoping to make an impressive win in some of the 11 States where the Republican Party's primaries are scheduled to be held on Tuesday.
"I think he (Rubio) hit back and he showed that's he's willing to lead. He's willing to fight. And he's going to have the passion to do it," Haley said, referring to the strong verbal dual unleashed by Rubio over the last few days against Trump.
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Ramping up the ante against Trump, Rubio has described the New York billionaire as a cone artist and dangerous for the party.
"What I will tell you is, Donald Trump can't be Hillary Clinton. His negatives are so high, his cap is at 35 per cent. It is impossible for him to win a general. And so that's why we've said Marco Rubio is the only one that can defeat Donald Trump. And Marco Rubio can beat Hillary Clinton and will win in November," Haley told the ABC News.
Trump, who has been drawing thousands of people at his election rallies, slammed Rubio as weak.
"I think he's a lightweight. He couldn't get elected dog catcher because to Florida, he's going to lose big league. He is not liked in Florida. He abandoned Florida. He deceived and defrauded Florida. He said he was going to be a senator, and that's the last thing -- he doesn't even show up to meetings," Trump told 'Fox News Sunday' in an interview.
"I think he's a guy who thinks he's hot stuff. He's not hot stuff. But he is I call him little Marco. That's what he is, he's little Marco," Trump said alleged that the fist fight between the two Republican presidential candidates scaled a new height on Sunday, two days ahead of the Super Tuesday when Republican presidential primaries would be held in 11 States.
Even as Rubio is not seen winning in any of the 11 States, if the latest polls are to be believed, party establishment rallied behind him hoping that the Florida Senator would stop the Trump bandwagon.
"I really believe that voters would see through this con job that he's trying to do, and, obviously, that hasn't happened. He's convinced a lot of people," Rubio said appearing on the same Sunday talk show.
"This is a guy -- you talked about Trump University earlier in your programme -- who went to people that were trying to improve their lives and convinced them to come into this program he created. They paid thousands of dollars, and they got nothing for it," he alleged.
"This has to end. We cannot allow this guy to become the Republican nominee. The Democrats will tear him to shreds and we're going to lose the party and the conservative movement, but more importantly, the election. And that means America's going to stay on the road it's on right now, which is the road of decline," Rubio said.