ST. LOUIS COUNTY, Mo. — Ann Wagner, who has represented a swath of suburban St. Louis in the U.S. House since 2013, said Monday she’ll seek a seventh term in this year’s elections. “The world is on fire, our nation’s economy is unaffordable for American families, and the liberal assault on our freedoms and liberties is running nonstop,” Wagner, a Republican from Town and Country, said in a statement. Wagner, 61, also said Democratic President Joe Biden and Democratic Congressional leaders “have taken our nation down a path of failure, one that must be stopped before it is too late.” The Republ…