If elected, would declare war against ISIS: Donald Trump

Republican presidential candidate Donald Trump

Christie, who was reportedly Trump's gut choice for running mate, suppressed any frustration with Trump's decision, calling the businessman a "friend" and "extremely generous", and praising Pence.

Pence took the stage to light, polite applause, thanking Trump for the confidence placed in him and his family, calling the businessman a "patriotic American" and a "fighter".

"We have the capacity in the United States of America to bring force to bear to destroy the enemy so they can not threaten our allies, or the United States, or inspire attacks in this country", says Pence.

At one point, Trump even seemed to suggest that he "didn't need" Pence to win over Evangelical voters.

Trump then gave Pence permission to answer yes.

"I call her 'Crooked Hillary.' She's crooked Hillary".

CBS's Lesley Stahl asked Trump about this in a joint interview with Pence broadcast Sunday night, and he minimized the importance of Pence's past stand. "I don't care", Trump said. "He won't... I didn't ask him to do it, but I don't think he should do it because it's different for him", he said.

The interview was similar to Trump and Pence's first campaign appearance together on Saturday, in which Trump barely mentioned his running mate. Ted Cruz (R-Texas), and campaigned with Cruz in Indiana.

"One of the problems you have there is that he is very hard right on social issues, so those people are either already with Trump or they're a relatively small part of the base".

"I knew him during the primaries, during many trips to IN, I'd be with him".

Trump dismissed concerns that the Republican party is divided on his candidacy.

"I promise you that when the circumstances arise where I have a difference on policy or on presentation, I can tell you in my heart, I know I would have no hesitation, were I privileged to be vice president, to walk into the president's office, close the door, and share my heart", Pence said. "'Cause if you're a competitive person, like I am, and you're used to winning, like I am - again, you don't like coming in second, ever", the governor told Nicolle Wallace.

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