Eight-term Rep. Albert Wynn (Md.) became the first Congressional casualty of the election cycle, losing his Democratic primary rematch Tuesday to attorney Donna Edwards. Trailing Edwards by more than 20 points with about half of the precincts reporting, Wynn conceded defeat at midnight. He beat Edwards by 4 points in the September 2006 Democratic primary. Meanwhile, Maryland’s other endangered Congressional incumbent, Rep. Wayne Gilchrest (R), was trailing in his attempt to win a tenth term early Wednesday morning. With 55 percent of the precincts reporting, state Sen. Andy Harris was ahead with 41 percent, Gilchrest had 35 percent and state Sen. E.J. Pipkin had 21 percent. If the race tightens, a winner may not be known for several days — after provisional ballots have been counted. — Josh Kurtz and John McArdle