Dems would pull every nuclear option available if the shoes were reversed.
Undoubtedly, they would. And you would criticize them for it.
You should therefore criticize the Republicans now just as harshly. Will you?
I'm not sure how I feel about this issue, but why should the GOP give the Democrats a courtesy they apparently were prepared to withhold themselves?
And the number of major initiatives that Obama has used executive orders to circumvent Congress is 1 (immigration), 2 (health care), 3 (guns), 4 (Iran), and counting, so again he refused the constitutional tip of the hat to them, so why are they obligated by honor to show him that deference?
He didn't circumvent congress on Iran, he didn't need Congressional approval. The list of international treaties and agreements put forth by former U.S. presidents without any congressional approval is really, really long. He passed immigration reform because Congress is so inept and ineffective, they were never going to get to changing the laws because everyone wanted so much of their personal pork added in.
Same thing with the background checks, Congress too busy with their hands out waiting for an NRA grease parade to get anything even to the floor.
Obamacare was his baby, he ran on it. We can go back and look at how presidents like GW Bush and Reagan "circumvented" Congress too if you want. Or really any president who got anything done since, well...forever.