Topeka ? A Washington group has filed a complaint with the U.S. Senate Ethics Committee against Kansas Sen. Sam Brownback.

The complaint was filed Wednesday by Citizens for Responsibility and Ethics in Washington, or CREW.

It concerns a recent anti-abortion fundraising letter sent out under Brownback’s name.

The letter criticizes Democratic senators who are Catholic but support abortion rights.

The letter was from a conservative group, Catholic Advocate, but it contained Brownback’s name and title. CREW contends the mailing violates a Senate rule against members using their letterhead for fundraising appeals.

Brownback spokesman Brian Hart said the senator asked Catholic Advocate to stop using the letter even before CREW complained.

He also said Brownback’s office believes there was no violation of Senate rules.