ObamaCare is a legitimate issue now and in the 2014 elections. But the obsession of the right over ObamaCare, leading certain pandering Republicans — now including Rubio — to threaten a government shutdown, represents a disastrous failure to understand why Congress (including the GOP House) is so unpopular and why the Republican brand is in so much trouble.
Rubio could have, and should have, made a cogent case to Republicans (as former Senate Majority Leader Bob Dole (R-Kan.) recently did) about why the road of pathological obstruction is the road to Republican disaster.
Instead, Rubio followed his statesmanship on immigration by wimping out to the right on healthcare. We have seen this script before. Ask Bill Clinton, America's most popular modern president by far. Ask Hillary Clinton, America's most likely future president by far.
Ask Newt Gingrich, you if can remember who he is.