The Senate Finance Committee is revising a health care overhaul bill this week. Sen. Olympia Snowe, who is thought to be the only Republican on the committee who may support the legislation, is expected to play a key role. What should she add to the bill? What should she seek to remove? Is a public option necessary to ensure competition or is it a ploy to move toward a government-run system? Are stronger protections to ensure illegal immigrants aren’t covered by the plan needed? Or is this a distraction?