A six-term Pennsylvania congressman said Tuesday he would not seek a seventh term, calling himself a believer in term limits. Republican U.S. Rep. Todd Platts said he planned to “remain an engaged servant of the people” through the end of the year. Platts, 49, said he has sponsored bills that would have capped terms at 12 years since he arrived in Congress in 2001. His south-central Pennsylvania district is reliably Republican, and Platts, a York native, was a formidable campaigner, thanks to a dedicated cadre of family, friends and other longtime supporters. Platts’ district includes York and Adams counties and...