The Denver-based American Right to Life Action (RTL) leads the charge against Coulter with a YouTube video that shows excerpts of Coulter’s on-air radio freak-outs and calls on the acid-tongued author to apologize and retract her support for Romney.

In typical Coulter fashion, she calls the critics “crazy Romney froofers,” “fanatics” and “on the order of 9-11 conspiracy theorists” before hanging up.

The foul-mouthed pundit, whose stock in trade is making withering remarks about liberals, may have met her match in American RTL’s leaders: ex-Colorado GOP chairman Steve Curtis, Brian Rohrbough, whose son Daniel died in the 1999 Columbine High School massacre, and bombastic Pastor Bob Enyart — the three men are no shrinking violets themselves.

The controversial group was established in November 2007 shortly after Colorado Right to Life was booted from its affiliate status with National Right to Life for running a series of ads criticizing Focus on the Family founder James Dobson for not being anti-abortion enough in The Washington [D.C.] Times and Colorado Springs Gazette.

American RTL then moved on as an outspoken backer of Amendment 48, the failed 2008 Colorado ballot measure that sought to give constitutional rights to fertilized eggs.

Bashing Coulter appears to be its latest cause célèbre.

Says Rohrbough in a written statement accompanying the video release:

Ann Coulter has misrepresented and even defended some of the most egregious and immoral behavior. When Ann covers up aggressively anti-marriage action, and pro-abortion legislation that actually funds the killing of unborn children, she apparently is motivated by a desire to distort the truth and deceive Christians for some personal gain.

Anti-abortion protesters, led by Randall Terry, were arrested for blocking an entrance to the DNC convention hall. (Photo/Dave Winer, Flickr))

And true to form, Terry and 12 followers were arrested by 50 officers in riot gear outside the Pepsi Center in downtown Denver for blocking an entrance after being warned three times to disperse. As he was led away to a paddy wagon, a handcuffed Terry shouted “Don’t vote for Obama” at DNC delegates and members of the press entering the convention hall.

California blogger Dave Winer documented the stand-off at Scripting.com.

Last weekend, Terry distributed hundreds of racist fliers at a DNC media party touting a fictitious “Candidate Smith,” proposing “real solutions for the ‘Negro problem’” as a shocking metaphor for Christian voters who support pro-choice but otherwise conservative political candidates.

The Colorado Independent reported a schism that has developed between Terry and Troy Newman, the leader of Operation Rescue West, a group that arose from Terry’s original group and that also engages in inflammatory picketing of women’s clinics.

Simultaneous to the sit-in, another dozen anti-abortion demonstrators rallied outside the Sheraton Hotel in Denver, where Emily’s List was holding an event featuring Sen. Hillary Clinton and others to back women candidates who support reproductive freedom.

Earlier Tuesday, supporters of American Right to Life Action unfurled a enormous banner that read “Destroys uNborn Children” — highlighting the DNC in the phrase — on a nearby hillside that the group claimed was visible in Denver, 10 miles away.

The banner, made of approximately 2,400 queen-sized bedsheets, remained on the mesa for three hours until Jefferson County law enforcement officials ordered its removal. While several members of the group scrambled back up the hillside to take down the sign, police tended to others who reportedly suffered heat exhaustion carrying the 2,700-pound banner.

American RTL was established in Denver in Nov. 2007 to aggressively usurp the national status of National Right to Life as the primary leader within the anti-abortion movement.

One of its primary thrusts is to challenge the “wicked courts” and oppose “child-killing regulations” through state-based laws attempting to overturn Roe v Wade, according to its Web site. The group is actively involved in Amendment 48, a proposed constitutional measure on the November ballot in Colorado to proffer due process rights on fertilized human eggs.