Mitch McConnell accused Democrats Tuesday of making excuses to oppose the Republican tax reform effort in order to antagonize President Trump.

"Democrats are under pressure from the left to oppose just about everything President Donald Trump touches — even ideas they themselves used to promote," the Senate majority leader wrote in an NBC op-ed. "This has sent Democrats scrambling for nearly any kind of excuse to oppose a tax-reform effort that fights corporate offshoring, eliminates loopholes for the wealthy and cuts middle-class taxes."

The Kentucky senator touted the GOP tax plan as an effort to simplify the code, deliver tax cuts, and keep businesses from leaving the country. Those goals "have traditionally been bipartisan," he wrote.

McConnell is under pressure to deliver the votes for tax reform in the Senate, where he has a slim GOP majority of just 52.

Trump has tried to pressure red-state Democrats to join in the effort to advance legislation, but Senate Minority Leader Chuck Schumer of New York has gotten the vast majority of his caucus to say they will oppose any bill that provides tax cuts to high income earners, as the tax framework introduced by Republicans would appear to do.

Politically vulnerable Democrats who might be persuaded to vote for a Republican bill so far have not committed to anything, as actual legislation has not been unveiled.

"Right now, the only plan out there is missing a lot of important details," Sen. Joe Donnelly, D-Ind., said last week.