Democratic Rep. John Conyers of Michigan has won a place on his district’s upcoming primary ballot after facing the threat of exclusion. The Wayne County elections clerk had initially ruled Conyers was not eligible for the primary because his campaign failed to collect enough valid signatures and one of his staffers was not properly registered to vote. But a federal judge has ruled the missteps by Conyers’ staff were the result of “good-faith mistakes,” wrongly believing they were in compliance. First elected in 1964, Conyers is the House’s second-longest-serving incumbent.