I think Bobby Rush is a good candidate for retirement; an even 30 years in the House seems like a good time to leave, and four other candidates have already announced they want to run for the 1st district.
On the Republican side, Fred Upton is in his 35th year, so now would seem like a good time to retire, and like Calthrina said, more Impeachment Republicans are likely to retire; Upton's brand of moderate Republicanism and his impeachment vote make him a RINO in many primary voters' eyes -- too many.
Rush might have an inflated ego from being the only guy to have ever beaten obama