ANNAPOLIS, MD (AP) -Maryland’s primary election is underway today. Former Republican Gov. Larry Hogan is seeking the U.S. Senate seat of Democrat Ben Cardin, who is not running again. Six other Republicans are challenging the 67-year-old Hogan for the post. Republicans are working hard to flip the U.S. Senate seat as Maryland has not elected a GOP U.S. Senator since 1980. On the Democrat side for U.S. Senate, Congressman David Trone has been locked in a contentious and expensive battle with Prince George’s County Executive Angela Alsobrooks, who has been endorsed by Gov. Wes Moore. Polls are open until 8 p.m.