(CNN) In the next round of Rand Paul vs. Donald Trump, the Republican senator from Kentucky is releasing his campaign's first digital ad against his presidential rival, hitting the frontrunner in a video for supporting Democrats in the past.

The video, which his campaign says will be aired in a "substantial" ad buy, launches Wednesday in New Hampshire and Iowa and runs through the weekend.

With ominous music behind it, the video opens with favorable statements that Trump has made about Democratic economic policies, Hillary Clinton, and universal health care. It also features a comment he made in 1999, in which he said, "I really believe the Republicans are just too crazy right."

At one point, text on the screen appears, asking if Trump is really "telling it like it is?"

Then it switches to the infamous clip of former President Bill Clinton answering: "It depends on what the meaning of the word is is."

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