Planned Parenthood's political arm is targeting vulnerable GOP Sen. Dean Heller Dean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE on comments he made about the sexual assault allegations against Supreme Court nominee Brett Kavanaugh.

A six-figure digital ad buy focuses on Heller reportedly saying the nomination had run into a "hiccup" following Christine Blasey Ford's allegations against Kavanaugh.

"Let's remind Sen. Heller that sexual assault is never a 'hiccup,'" a narrator says in the ad.

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According to the Nevada Independent, Heller made the comment during a "VIP" conference call arranged by the Nevada Republican Party in September.

“I’m really grateful for the White House, for the effort of President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE and what he has done, and the excitement that we have,” he said, according to the Independent.

“We got a little hiccup here with the Kavanaugh nomination, we’ll get through this and we’ll get off to the races,” he said.

Heller later told the Independent his comments were directed at how Democrats handled the allegations, not the allegations themselves.

While Heller has said he'll vote to confirm Kavanaugh, the ad encourages viewers to urge him to vote no.

Heller is one of the most endangered Senate Republicans running for reelection in November.

Cook Political Report rates the race between Heller and Democratic candidate Jacky Rosen Jacklyn (Jacky) Sheryl RosenHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections Google, Apple, eBay to meet virtually with lawmakers for tech group's annual fly-in Senate Democrats demand answers on migrant child trafficking during pandemic MORE as a "toss up."

Planned Parenthood has been highly involved in the midterms, and plans to spend $20 million in key races ahead of November.