I was just handed a 479-page tax bill a few hours before the vote. One page literally has hand scribbled policy changes on it that can’t be read. This is Washington, D.C. at its worst. Montanans deserve so much better. pic.twitter.com/q6lTpXoXS0

The handwriting in the margins may have swayed some reluctant Republicans, but it triggered angry Democrats.

The nearly 500-page Senate tax bill, passed just before 2 a.m . Saturday on a party-line vote, included handwritten changes that Democrats say prove the process was rushed.

“This is unbelievable!” Montana Democrat Jon Tester said in a video on his Twitter account, waving a 3-inch thick printout of the bill at the camera.

Tester grabbed one page from the bill and tried to read a partly illegible handwritten paragraph along the right margin.

“This is your government at work,” Tester said.

“I couldn’t read it if I tried — and I did,” tweeted Democratic Sen. Elizabeth Warren of Massachusetts.

The last-second changes helped secure Republican support for the bill from some wavering senators.