President Barack Obama on Thursday will meet with two key potential swing votes as he ramps up his personal lobbying on health care reform.Obama will meet separately in the morning at the White house with Sens. Ben Nelson (D-Neb.) and Olympia Snowe (R-Maine).Snowe will be the fifth Republican to meet with Obama this week to talk about health reform, following a session with four other GOP Senators on Wednesday.Snowe is a member of the Finance Committee, where Chairman Max Baucus (D-Mont.) is seeking to corral Republicans onto what he hopes will be a bipartisan bill. Obama has been pressing Baucus to quicken his pace, and his willingness to meet with Snowe could signal that the president wants to dive into the talks and help Baucus try to seal a deal.