 In 2010, Frank ran for his 16th term. Public opinion polling showed him facing his first credible challenge since defeating Heckler in 1982. His opponent was Republican Sean Bielat, a U.S. Marine veteran and businessman. In mid-September, an internal poll showed Frank leading 48 % – 38 %. In late October, he loaned his campaign $ 200,000. In early October, the Cook Political Report changed its assessment of the district from "solid Democratic" to "likely Democratic" — meaning that while Frank was favored, a victory by Bielat could not be entirely ruled out. While Frank had a 3-to-1 advantage in terms of cash on hand, Bielat outraised him in September. On October 25, a Boston Globe survey showed Frank leading 46 % – 33 %. Frank won re-election to his 16th term, 54 % – 43 %.
