House Minority Leader Nancy Pelosi (D-Calif.) took to Twitter Tuesday to criticize House Budget Committee Chairman Paul Ryan's (R-Wis.) budget plan.

While Ryan was still holding a press conference rolling out his plan to slash $5.8 trillion from current spending levels over 10 years, Pelosi slammed the budget, keying in on its drastic Medicare and Medicaid reforms.

The #GOP Ryan budget is a path to poverty for America's seniors & children and a road to riches for big oil #GOPvalues

#GOP Path to Poverty budget eliminates guaranteed benefits for seniors under Medicare #GOPvalues

Democrats are trying to make Ryan's budget radioactive by labeling as privatization his changes to entitlement programs.

Ryan is spending the day selling his plan to his colleagues and the public, saying that serious spending cuts need to be made now to stave off a full-blown fiscal crisis.

He also recognized that his plan might not be popular.

"Yeah, this stuff isn't politically popular. If it was, it would be fixed by now," he said on CNBC Tuesday morning.