Eliza Collins

USA TODAY

Hillary Clinton has pulled out her secret weapon.

On Tuesday night the Clinton campaign announced a new TV ad featuring first lady Michelle Obama.

“Hillary will be a president our kids can look up to. A president who believes in our kids and will fight for them every day. That’s why I believe in her,” Obama says in the ad, the first TV spot she has done for this campaign season.

The video is in addition to a radio ad featuring the first lady that is already on air in Florida, North Carolina, Ohio and Pennsylvania.

Obama is also campaigning for Clinton on Wednesday in Pennsylvania.

The first lady was one of the breakout stars of the Democratic National Convention this summer.

While both Donald Trump and Hillary Clinton have dismal favorability ratings, the first lady is well-liked.

ReaClearPolitics shows that on average, 37% of survey respondents say they have a favorable view of Donald Trump, while his unfavorable average is 58%. Clinton’s ReaClearPolitics favorabilty average is 40%, her unfavorable number is 55%.

There is no comparable RealClearPolitics average for Michelle Obama, but a Gallup survey taken in August following the convention, had her at a whopping 64% favorability, with only 32% of respondents expressing an unfavorable view of her. Those numbers put her ahead of her husband and both candidates and their spouses.