Sure there are, but currently what is going on with the Republicans is not on the same scale as what has been normal double standards for 100 years.
Trump is in fact outdoing almost all of the things they accused Obama of doing, and they are falling right into line.
They used to claim to be the party of Family Values and attacked any Democrat who was not what they envisioned as the 1950's ideal father and husband. Now they cant defend Trump's immorality fast enough. They don't care an inch about his three wives, his serial adultery, his children out of wedlock, his lack of being a father to his son, his wife's pornographic past. They are tripping all over themselves to justify it.
We need a strong Republican party, but they have completely capitulated over all the things they pretended mattered to them for decades.
This is not everyday double standards, this is not normal, this is beyond the pale.