Heidi Cruz has been called her husband Ted's not-so-secret weapon on the presidential campaign trail. She is his top fundraiser and chief surrogate. She sat down with Grace Rauh for an exclusive interview Tuesday to talk about the race.

Heidi Cruz is a very different kind of political spouse than any other this campaign season, except maybe former President Bill Clinton, but he's in a unique category all his own. She works full-time for Goldman Sachs and has taken a leave of absence from her job to help her husband's bid for the White House.

She is helping to soften his public image as well. Ted Cruz is not known for his winning personality, but Heidi Cruz insists it is a misconception that her husband is difficult to get along with or combative.

Heidi Cruz: Ted calls me in the middle of the day just to sing to me.
Rauh: What does he sing to you?
Heidi Cruz: Oh, many things. He loves Broadway. Ted loves a good show. He often sings that song, "I just called to say I love you." Ted is the easiest person to live with. He's very even-tempered. He's totally unflappable. He never gets mad. And you've seen that publicly. There have been a lot of names that Ted has been called. There are a lot of things that his Senate colleagues have said about him. It's because they feel threatened by the truth that has been his political career, and by what he is trying to do. Ted never responds in kind.

Heidi Cruz has been pulled directly into the campaign battle by her husband's chief rival, Donald Trump. Trump threatened to "spill the beans" on Heidi and retweeted an unflattering picture beside a picture of his own wife, a former model.

The National Enquirer also published a story accusing Cruz of having had multiple affairs. He denied it.

Heidi Cruz says the barbs are garbage designed to distract voters from her husband's campaign victories, and she took aim at Trump, although she did not use his name.

"I don't think that voters want to elect a commander-in-chief that is tweeting, that is using henchmen to put out things that are untrue. We need a commander-in-chief that cares about the American people," she said.

Heidi Cruz also talked to us about so-called New York values and how she used to get around the city when she lived here at the start of her banking career.

You can watch the full interview on "Inside City Hall" at 7 p.m. and 10 p.m.