Mitch McConnell just released the names of the senators joining him at the health-care summit on Thursday:

Sen. Jon Kyl, R-Ariz., Senate Republican Whip
Sen. Lamar Alexander, R-Tenn., Senate Republican Conference Chairman
Sen. Chuck Grassley, R-Iowa, Ranking Member Senate Finance Committee
Sen. Mike Enzi, R-Wyo., Ranking Member Senate Help Committee
Sen. John McCain, R-Ariz., HELP Committee
Sen. Tom Coburn, M.D., R-Okla., HELP Committee
Sen. John Barrasso, M.D.,R-Wyo.