Video (02:12) : When Laurie Coleman, wife of U.S. Sen. Norm Coleman, hauled her trash to the alley at 7:30 this morning, a chilling sight greeted her. Spray-painted in black on the wooden siding of the garage in the couple's Summit Hill neighborhood was this angry graffiti, in letters nearly a foot high: "U R A CRIMINAL RESIGN OR ELSE! PSALM 2"

When Laurie Coleman, wife of U.S. Sen. Norm Coleman, hauled her trash to the alley at 7:30 Wednesday morning, a chilling sight greeted her. Sprayed in black on the wooden siding of the garage behind the couple's St. Paul home, in letters nearly a foot high: "U R A CRIMINAL RESIGN OR ELSE! PSALM 2" On the alley side, "SCUM" was scrawled across both garage stall doors and a wooden partition in between. The Colemans weren't alone. Vandals struck the garages and homes of five other Minnesota members of Congress late Tuesday or early Wednesday, spray-painting graffiti that called for them to resign and included a biblical reference to "Psalm 2." In Minneapolis, Sen. Amy Klobuchar went to fetch the newspaper and found that the side of her home had been defaced, as did Kim Ellison, the wife of U.S. Rep. Keith Ellison, also in Minneapolis. The garages of Rep. Michele Bachmann, of Stillwater; Rep. Jim Ramstad, of Minnetonka, and Rep. John Kline, of Lakeville, also bore similar graffiti. Klobuchar and Ellison are Democrats; Coleman, Bachmann, Ramstad and Kline are Republicans. DFL Rep. Betty McCollum, who lives in a St. Paul condominium, did not have her property vandalized -- nor were the homes of representatives in outstate Minnesota. Peter Panos, spokesman for the St. Paul Police, said the threatening nature of some of the graffiti elevates concerns. "We're looking at this as an actual threat," he said. "We're taking it quite seriously. Vandalism threats are pretty rare in this city." Police in the different jurisdictions are investigating the incidents and may coordinate their efforts today, Panos said U.S. Capitol Police spokeswoman Sgt. Kimberly Schneider said that the Capitol Police in Washington are assisting in the investigation. Capitol Police deal regularly with threats to members of Congress or their offices, and could potentially have data from any previous incidents. Early morning discoveries

Sometime between 10 p.m. and 7 a.m., someone came alongside the north Minneapolis corner home of Keith and Kim Ellison and left the words "TRAITOR. RESIGN NOW. PSALM 2," for a shaken Kim Ellison to find. Larry Weiss, Keith Ellison's campaign manager, noted that the word "SCUM" was spray-painted high enough above the garage door that the culprit probably would have needed a step stool. Ramstad, who has represented the Third Congressional District in the western suburbs since 1991, found that his Minnetonka property had been violated in the night. The garage door was emblazoned with the message, "U R A sellout!!! Psalm 2," and the word "SCUM" was sprayed above the door, according to Ramstad spokesman Lance Olson. Ramstad, who is not running for reelection, found the incident disturbing, Olson said. A spokesman for Kline, Troy Young, said similar language was spray-painted on the congressman's garage door, although he declined to say what the words were or when the incident occurred, and would not say whether Kline was home at the time. In Stillwater, Bachmann's home, garage and driveway were defaced with the words "Resign Now, Scum, Psalm 2" said spokeswoman Michelle Marston. Curiously, the graffiti also said "Vote No on the bailout." Bachmann was one of 171 members of Congress to vote against the $700 billion financial bailout package this month. Kathryn Pearson, a political science professor at the University of Minnesota, said while the 2008 election cycle has been marked by exceptionally heated rhetoric, the graffiti incidents are in a category apart. "This is very unusual and quite disturbing," Pearson said. "It's hard to know what to make of this, but this is just not the next step in anger about the state of the nation or the economy. I can't think of a time when so many members of a [congressional] delegation were targeted in this particular way." The invocation of Psalm 2 also does little to shed light on possible motives. Sometimes called the coronation psalm, it refers to rulers who have displeased God and risk his wrath, said William Barnes, a professor of Hebrew and the Old Testament at North Central University in Minneapolis. "I took it to a meeting [of biblical scholars] today and we just don't know what to make of it," he said. "It's not something we've commonly seen used in a political context."