COLORADO SPRINGS, Colo. -

Civil rights activists marched into Rep. Doug Lamborn's office on Monday morning. They are outraged over comments he made last month on a Denver radio show with reference to the President and a "tar baby."

They addressed their concerns with letters.

"As your constituents, we are profoundly troubled by the interview in which you so inappropriately used the term "tar baby" in speaking about President Barack Obama and his policies. Other than media reports and the three sentences posted on your website, we your constituents-have heard nothing," wrote RoseMary Harris Lytle, Colorado Springs Chapter President NAACP.

"We the officers and members of the Southern Colorado Ministerial Union, and the congregations we lead are very disturbed by the comments of "tar baby" and other derogatory statements made by Congressman Doug Lamborn and are requesting his immediate resignation," wrote Pastor James McMearn and others from SCMU.

Lamborn was not available for immediate comment. The protesters, however, were able to talk to a Press Assistant Jarred Rego. He said the congressman would gladly speak to them when he returned to Colorado next week.

The group also expressed their concerns over not being allowed to meet with any representatives of Mr. Lamborn inside his conference room. "They knew we were coming, no seat, no table, it's a triple insult," said McMearn.

Lamborn issued this statement about the "tar baby" comment on Aug. 1:

Congressman Doug Lamborn today sent a personal letter to President Barack Obama apologizing for using a term some find insensitive. Lamborn was attempting to tell a radio audience last week that the President's policies have created an economic quagmire for the nation and are responsible for the dismal economic conditions our country faces. He regrets that he chose the phrase "tar baby," rather than the word "quagmire." The Congressman is confident that the President will accept his heartfelt apology.