I'd argue that obstructionism is exactly why the Republicans have dominated Dems for the past 8 years. It kept their based engaged and passionate, it destroyed most of Obama's domestic agenda, and left his crowning achievement, health care reform, in shambles due to no common sense amendments to improve it. Working with Trump won't lead to any legislative victories. McConnell and Ryan assure that. All it does is validate him, and deflate the base.
Yes. Like I said, the Republican base loves small government and they hate the Democrats so that combination of factors is why it works from them. And they stop themselves from losing seats to Democrats and Independents who don't like that shit by a combination of gerrymandering, voter suppression and ID laws, and using off-year elections and lower voter turnout to their advantage.
The same can't be said for Democrats. Their base is different from the Republican base. They don't have the same vicious hate of the government that Republicans do. They just want to see stuff get done. And if that doesn't happen... well, they're probably going to be in worse shape than they would have already been.
And in any case, like I said, it has no effect on the President either way. Obama's favorables are great. If obstructionism reflected on the President, his favorables should be in the toilet, but it's the opposite. I can only expect that would hold true with a Republican as President especially as on top of that it's as the saying goes "Republicans fall in line, Democrats fall in love." They'll show up regardless and vote in force to get rid of the Democrats if they try that. Democrats on the other hand? Playing a very risky game if you're betting on that energizing the base, since the Democratic base is very different and isn't as favorable to that kind of nonsense.
And since one of the big problems in this election was a hyper-energized Republican base that pretty much came out of nowhere and nobody expected to be as energized and to come out in as much force as it did this election, it's really playing with a super-huge fire to bet whatever base is energized on the Democratic side by that strategy wouldn't be outweighed by the Republican base it causes to show up due to being ticked off at the D's trying to steal their tricks. That's pretty much the exact strategy Clinton bet on, after all (an energized D base showing up and the R base being depressed--the D's do indeed appear to have shown up for the most part in areas like Pennsylvania and Florida, but they were overrun by hyper-energized R's elsewhere). She lost. I'm not quite so prepared to bet on the same strategy again.