If you look solely at the judiciary the way MarkD does there's a strong argument for shared blame, but if you're also looking at the elected branches' abdication of their responsibility to seriously steward and govern this country, there's no question that the Republicans, especially in the past fifteen years or so, have done far worse. The only people who dispute this are those who dispute that democratic decline is occurring in America or those who dispute that America was or was supposed to be a democratic country in the first place.
This. Having said that I wasn't a fan of the antics that Democrats did with OH after Kerry legitimately lost, either: some voted against certifying OH. Overall, though, the GOP is obviously much more (see: the entire presidency of Donald Trump, particularly after his loss, and its aftermath, as well as McConnell holding blatant double-standards for SCOTUS confirmations).
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