Former House Speaker Dennis HastertJohn (Dennis) Dennis HastertFeehery: Trump may be down, but he's not out yet John Feehery: The woke versus the workers Feehery: Impeachment fever bad for Democratic governing vision MORE (R-Ill.) is slated to headline a fundraiser for Rep. Todd Tiahrt's (R-Kan.) Senate campaign, according to an invitation to the event obtained by The Hill.

The fundraiser will occur on Monday, April 20 in Chicago, according the invite. Tickets to the luncheon are $1,000 each.

Tiahrt is running for retiring Sen. Sam Brownback's (R) seat. He is currently locked in what is anticipated to be a close GOP primary against Rep. Jerry MoranGerald (Jerry) MoranMcConnell signaling Trump trial to be quick, if it happens Overnight Defense — Presented by Huntington Ingalls Industries — Furor over White House readout of Ukraine call | Dems seize on memo in impeachment push | Senate votes to end Trump emergency | Congress gets briefing on Iran Senate again votes to end Trump emergency declaration on border wall MORE.

Interestingly, Hastert's support of Tiahrt coincides with his apparent distaste for Moran. In his 2004 book, "Speaker," Hastert criticized Moran without specifically naming him for saying he would vote one way on legislation than voting another.

Writing about the 2003 vote that passed Medicare prescription drug legislation by five votes, Hastert singled out Moran.

"Some members had assured me that they would be with us, but when the crunch came, they weren't," Hastert wrote. "One prairie state member, a fourth-term representative from a solidly Republican district, voted no, then ran and hid. I sent people to find him. They couldn't. Representative Tom Osborne, a Republican from Nebraska, went to look for him to no avail."

Moran disputed the characterization in the book, telling the Associated Press that the passage