By COLLEEN SLEVIN
DENVER (AP) — A federal judge has blocked Colorado from enforcing a new law raising the age to purchase a gun from 18 to 21. U.S. District Judge Philip Brimmer issued a preliminary injuction regarding the law Monday following a legal challenge by a gun rights group. In a ruling that frequently referenced a U.S. Supreme Court ruling that expanded Second Amendment rights last year, he concluded that the lawsuit would likely succeed and barred the state from enforcing the law until the case is resolved. The law was one of four gun control bills signed by Democratic Gov. Jared Polis in April, following the lead of other states trying to confront a surge in violent crime and mass shootings.