Add Charlie Dent to the list.

As of April 11, 2018, 54 representatives will not seek re-election to their U.S. House districts.

ballotpedia.org/List_of_U.S._Congress_incumbents_who_are_not_running_for_re-election_in_2018?utm_source=ballotpedia&utm_medium=frontC&utm_campaign=57%20members%20of%20Congress%20not%20seeking%20re-election;%202018%20second%20only%20to%201992%20in%20total%20retirements