've been told that this could n't be done, Obama said, citing the decades of failed health care reform efforts. Last night, the House proved differently. The president called the support by many House members courageous in the face of the heated and often misleading rhetoric around this legislation. Now it falls on the United States Senate to take the baton and bring this effort to the finish line on behalf of the American people, Obama said. And I 'm absolutely confident that they will. However, Republicans and an independent senator who sits with the Democratic caucus signaled Sunday that difficulties remain for Obama on his top domestic priority. Sen. Joseph Lieberman, an independent from Connecticut, reiterated that he would join a Republican filibuster against a health care bill if it contains a government-run public health insurance option after the chamber's amendment process. Speaking on Fox News Sunday, Lieberman called the controversial public option, which is in the House bill and the Senate version being prepared by Reid, an unnecessary provision intended to bring government-run health insurance in the future. If the public option is in there, as a matter of conscience, I will not allow the bill to come to a final vote, Lieberman said. He previously has said he wo n't oppose opening Senate debate on the bill despite the public option provision, and he