They risk losing Congress if they pass it. Clinton tried to pass Hillarycare in 1993 and the Democrats got creamed in 1994, losing the House and Senate. Obama did pass Obamacare in 2009 and the Democrats got creamed in 2010, losing the House and Senate. Now the GOP is trying the same thing and hoping for different results.
They risk losing Congress if they pass it.
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A most excellent and insightful comment in its entirety. Well done!