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Despite its flaws, it will certainly be a better place to practice than a "Medicare-For-All" Bernie Sanders nightmare that we might get in this country.
For "Medicare for all" to become a reality several things need to happen, and all of them must happen or it dies:
1) Either Warren or Sanders needs to win the presidency. This could happen, but it's far from certain and elections as we know, are hard to predict on election day, let alone a year out.
2) Democrats would need to hold the House. More likely than not this will happen, since they already have it and the House map favors the Dems.
3) Democrats would have to win the Senate. This is possible, but less than a 50% chance, since only 1/3 of the Senate is up for election in 2020 and the Senate map favors the GOP.
4) They'd have to get a Medicare for all bill, that necessarily must
outlaw and bankrupt all private insurance companies, all of which have been lining the pockets of both Republicans and Democrats for decades and expect paybacks.
In my opinion, any one of those could easily happen. 1-3 happening would not be a shock (although I think the Senate will be tough). But honestly, I think the need to outlaw and bankrupt private insurance companies, which are huge and have bribed the politicians in both parties, is a less than 0.1% proposition. Politicians of both parties, will choose their best interest and lining their own pockets over principle 9 out of 10 times. This is what makes a Medicare for all system so unlikely to come out of our political system, in my opinion.