A new Hillary ClintonHillary Diane Rodham ClintonColorado governor teases possible presidential run Mueller asks judge for September sentencing for Papadopoulos House Judiciary Committee subpoenas FBI agent who sent anti-Trump texts MORE presidential ad takes aim at her “dangerous” Republican rivals. 

“Think about it. One of these Republicans could actually be president,” the ad’s narrator says as Republican presidential candidates Donald TrumpDonald John TrumpGOP lawmakers preparing to vote on bill allowing migrant children to be detained longer than 20 days: report Wasserman Schultz: Infants separated from their parents are in Florida immigrant shelters Ex-White House ethics chief: Sarah Sanders tweet violates ethics laws MORE and Ted CruzRafael (Ted) Edward CruzSenate left in limbo by Trump tweets, House delays The Hill's Morning Report — Sponsored by PhRMA — Immigration drama grips Washington Senate Gang of Four to meet next week on immigration MORE are shown talking about bombing American enemies. 

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“They’re backward, even dangerous,” the narrator adds, saying that Clinton is the only Democrat who “can stop them.” 

The ad, titled “Incredible,” is set to air in New Hampshire and Iowa.  

A Republican National Committee spokesman slammed Clinton for "doubling down" on "failure." 

"Under President Obama we've become less prosperous, less safe, and less free but incredibly Hillary Clinton wants to not only double down but expand on this legacy of failure," spokesman Michael Short said in a statement. 

Watch the ad above. 

--Updated at 7:40 p.m.