In Washington D.C., it's usually been former Vice President Dick Cheney who has drawn the comparisons to Darth Vader.

But comparing your political enemy to the villain of Star Wars is a bipartisan pastime. On Wednesday, U.S. Rep. Blaine Luetkemeyer (R-Missouri) said it was U.S. Sen. Elizabeth Warren (D-Mass.) who bears a passing resemblance to the Sith Lord.

Warren's office did not respond to a request for comment, but struck back in a fundraising email the next day.

An economics writer with the Washington Examiner noted the comment in which Luetkemeyer said Warren is the "Darth Vader of the financial services world." The comments came at a American Bankers Association gathering.

At ABA, Rep. Blaine Luetkemeyer calls LIz Warren the "Darth Vader of the financial services world," says need to find way to "neuter" her — Joseph Lawler (@josephlawler) March 16, 2016

Warren, elected in 2012 after beating Republican Scott Brown, has been a harsh and steady critic of Wall Street and the financial services industry, urging her supporters to "fight back" against "big banks."

The "neuter" comment drew immediate condemnation UltraViolet, which describes itself as an "online community of over 700,000 women and men who take collective action to expose and fight sexism in the public sector, private sector and the media."

The group said Luetkemeyer should apologize for the remark, calling it "offensive, sexist and out-of-line."

"Comments like these, which sound eerily similar to something that Donald Trump would say, have no place in American politics and speak to the impact that Donald Trump is having on the discourse coming out of the Republican party," Nita Chaudhary, co-founder of UltraViolet, said in a statement.

"There is plenty of room for disagreement in Washington, but resorting to sexist name-calling should have no place in our political discourse," the co-founder added.

This post was updated with a link to a story on Warren's response.