Two years of calm, during which he had a Republican House, Senate, and Supreme Court? If he couldn't get anything done when his party controls the entire government, what makes you think he can now without control of the House?
I predict the next two years will be legislatively boring, and in 2020 the Dems with have a mountain of unfulfilled promises to present to swing voters, keep the House, take the Senate, and take the White House.
I could be wrong. We'll see.