More than 100 House Democrats -- nearly half of the new majority -- have signed on to a new single-payer healthcare bill that supporters describe as "battle ready." If by "battle ready," they mean, "extremely controversial, deeply politically risky, and totally bereft of any acknowledgement of the proposal's eye-poppingly exorbitant costs," they're undoubtedly correct. Politico's story on the legislation is full of extraordinary tidbits and quotes. Here are some of the most important facts we've learned: (1) The bill "doesn’t include a price tag or specific proposals for financing the new system, which analysts estimate would cost tens of trillions...