A former top Michigan Republican Party official has filed suit in federal court to strike down limits on campaign contributions to state candidates. Greg McNeilly, who served as executive director of the state GOP, says caps on donations to legislative candidates have not been adjusted for inflation since their enactment in 1976, and impose an unconstitutional restraint on his right to back candidates of his choice. McNeilly’s attorney claims Michigan’s contribution limits of $500 for state House candidates and $1,000 for state Senate candidates have lost nearly 75% of their value since 1976, and the result has been to limit the ability of outsiders to mount a credible challenge to incumbent politicians.