The Mid-Coast Forum on Foreign Relations sponsors a debate among US Senate candidates, Cynthia Dill, Angus King, and Charlie Summers.  TCamden Opera House. The topic of the debate will be “Foreign Relations: What Maine’s New Junior Senator Can Do.” No charge, but come early to secure a seat. Doors open at 5 p.m. FMI: 236-8288 or midcoastforum.org.