House and Senate Republicans gathering Wednesday in Philadelphia for their three-day issues retreat will get a pep talk from NFL great Peyton Manning, hear from British Prime Minister Theresa May, and jam to music from ’90s band White Ford Bronco. The newly sworn-in president is slated to address lawmakers during lunch Thursday as Republicans – now in full control of government – try to plot out their 2017 legislative agenda on such issues as ObamaCare, tax reform, border security and infrastructure.