Democrat Randy Bryce is out to upset Republican House Speaker Paul Ryan of Janesville in the 1st Congressional District next year.

But first, he might have to get a handle on his tweeting.

Amid reports that the first charges were to be handed down in the probe led by special prosecutor Robert Mueller III, Bryce tried to crack wise Sunday.

The ironworker from Caledonia ended up taking a veiled swipe at President Donald Trump's daughter, Ivanka, and her husband, Jared Kushner.

Bryce tweeted: "Don’t worry @jaredkushner regardless of what might go down - she’ll be okay. #MuellerTime." The tweet was accompanied by a photo of Ivanka Trump sitting next to Canadian Prime Minister Justin Trudeau.

Bryce's Democratic opponent, Cathy Myers of Janesville, fired back: "Don't worry #WI01, I'm going to win my primary v @IronStache, so you don't need to vote for someone who thinks women need a man to be okay."

She also referenced a July 22, 2016, tweet from Bryce in which he wrote: "If you look up the word succubus, you'll see Ivanka Trump."

The Merriam-Webster Dictionary defines succcubus as "a demon assuming female form to have sexual intercourse with men in their sleep."

Asked about Sunday's tweet, Bryce said: "Donald Trump, Jared Kushner, Roger Stone, Paul Manafort — the whole lot — have demonstrated to the world what inappropriate conduct looks like: colluding with a hostile foreign power to influence an American election. My neighbors and I are sitting here very anxiously this weekend hoping that justice begins tomorrow."

On Monday, Myers called on Bryce to delete the Ivanka Trump-related tweets and apologize.

In a statement, Myers said: "Randy Bryce's refusal to address this issue shows that he doesn't understand why his comments are disrespectful to every woman in Wisconsin's First District. He needs to understand why it's inappropriate to attack a woman he disagrees with by sexualizing and objectifying her. I won't stand for it in this race or anywhere else."

Daniel Dale, Washington correspondent for the Toronto Star, noted: "Democratic congressional candidate suggests Ivanka will hook up with Trudeau, or something, if her husband gets arrested."

Others weighed in on Bryce's Twitter feed, taking him to task for the comment.

RELATED:Speaker Paul Ryan says Manafort, Gates indictments won't 'derail' GOP agenda

RELATED:From hard-hat worker to political hardball, Randy Bryce challenges Paul Ryan for Congress

On Monday, Chris Martin of the National Republican Congressional Committee, said: "Randy Bryce is suffering from a chronic case of foot-in-mouth syndrome."

He added, "With the Harvey Weinstein revelations still in the spotlight, do Bryce’s Hollywood allies like Chelsea Handler stand by his sexist tweet?"