Text from article: In a letter to Homeland Security Secretary Kristi Noem on Tuesday, the Democrats also said they are “deeply concerned” by allegations that immigration agents were using sirens on their vehicles to act as if they were local law enforcement. A nonprofit in Eagle County previously said nine men were captured and taken to detention Jan. 21, including eight who were in four different vehicles pulled over in “fake traffic stops.” “This behavior leads individuals to believe they are lawfully required to pull over for a traffic violation when in reality, the federal government has no authority over local or state traffic regulations,” wrote U.S. Sens. John Hickenlooper and Michael Bennet, along with U.S. Reps. Diana DeGette, Joe Neguse, Jason Crow and Brittany Pettersen. “Federal agents acting in disguise as local law enforcement is misconduct and should be treated as such.” The ace of spades cards, printed with the address and phone number of U.S. Immigration and Customs Enforcement in Denver, were found by family and friends who went to retrieve the vehicles left on U.S. 6 near Minturn in Eagle County, the nonprofit said. Ace of spades cards are linked historically to racism, including as “death cards” left on dead bodies during the Vietnam War. The cards were found in at least two vehicles that day, according to Voces Unidas, a nonprofit based in Glenwood Springs that is tracking ICE activity in several mountain communities.