From the New York Daily News:

Even some Democrats thought Stephen Colbert’s Capital Hill routine was more gaffe than goof.
House Majority Leader Steny Hoyer called the Comedy Central star’s bit, which had some laughing and others groaning last week, “not appropriate.”
“I think it was an embarrassment for Mr. Colbert more than the House,” the Maryland politician said on “Fox News Sunday.”
“What he had to say was not the way it should have been said,” Hoyer added.
The “Colbert Report” funnyman was invited to testify before the House Judiciary Committee by Democratic Rep. Zoe Lofgren, a move that rankled some.