President Donald Trump on Tuesday lashed out at Senate Democrats and "a few Republicans" for the collapse of the Senate health care bill -- and he vowed to "let Obamacare fail" now that it's clear Congress won't be able to come up with a replacement for it.

"We were let down by all of the Democrats and a few Republicans," Trump wrote. "Most Republicans were loyal, terrific & worked really hard. We will return!"

In a followup tweet, he outlined the party's strategy going forward: Letting the current law fail and then forcing the Democrats to come negotiate over a replacement bill.

"As I have always said, let ObamaCare fail and then come together and do a great healthcare plan," he wrote. "Stay tuned!"

The Republican health care bill fell apart on Monday when Sens. Jerry Moran (R-KS) and Mike Lee (R-UT) said they would not vote for the motion to proceed with a debate on the bill.

Senate Majority Leader Mitch McConnell subsequently said that he would introduce a bill to the floor that would straight-up repeal the Affordable Care Act without offering any kind of replacement.