1st Constitution was a corporate sponsor of the 4th Annual Mercer Irish Fest at Mercer County Park on Saturday 9/6 and Sunday 9/7, which The Trenton Irish Heritage Association hosted.    Attendees of the festival enjoyed Irish bands, vendors selling Irish crafts, amusement rides for the kids, a petting zoo, pony rides and gifts from the sponsors. One lucky attendee won the raffle for a BBQ Grilling Set from 1st Constitution.