[1] https://newrepublic.com/article/138787/obama-can-put-merrick...
[2] https://en.wikipedia.org/wiki/Merrick_Garland_Supreme_Court_...
As you said, McConnell and the Republican Senate refused to hold hearings on Obama's Supreme Court nominee, in March more than seven months before the election 2016 election - "Give the people a voice in the filling of this vacancy" said McConnell. [1]
The other half:
Four years later, they had no problem confirming Trump's nominee in late October, not two weeks before Trump's 2020 election - and McConnell said "The precedent only applies when different parties control the Senate and the White House." [2]
To me the inconsistency seems contrary to the spirit of democracy.
[1] https://www.republicanleader.senate.gov/newsroom/remarks/mcc...
[2] the precedent only applies when different parties control the Senate and the White House
Despite promises to "repeal Obamacare" they never did repeal it... or even change it much at all. It was just too popular / the consequences too much to consider.
The joke at the time being that the Republicans would repeal Obamacare and replace it with the Affordable Care Act ;)
FWIW, Nixoncare, totally blocked by Ted Kennedy because the dems didn't want Nixon's name on anything else that was nice (the Clean Air Act President kept claiming he'd end Johnson's war in Vietnam and then he had the gall to open relations with China!), was more like the single-payer health care Obama ran on but could not produce.
Also: Disclaimer, I'm absolutely not a conservative. I just don't like the liberal rewrites of actual history.
Campaign finance
Trading on privileged information
Voting as a bloc and not in favor of their constituents
Being a useless and ignorable vocal opposition when their bloc is not in power, ignoring indiscretions when their bloc is in power
It seems like the parent is clearly asking for a concrete example.