In a Sunday morning tweet, President Donald Trump advised Senate Republicans to employ the nuclear option and “vote on a real, long term budget” should the stalemate in Congress continue.

“Great to see how hard Republicans are fighting for our Military and Safety at the Border. The Dems just want illegal immigrants to pour into our nation unchecked,” Trump tweeted.

“If stalemate continues, Republicans should go to 51% (Nuclear Option) and vote on real, long term budget, no C.R.’s!” he added, referring to a temporary spending measure known as a continuing resolution.

Republican and Democratic lawmakers continue to place blame for the shutdown on the opposing party.

Referencing Senate Minority Leader Charles Schumer, D.-N.Y., Republicans are branding the stalemate the “Schumer Shutdown,” and contend that the Senate Democrats are responsible because they rejected a continuing resolution passed by the House that would have allowed the government to remain open.

Democrats are blaming Trump, with Schumer arguing that Democrats cannot negotiate with a president who frequently changes his position and is beholden to right-wing supporters over his own priorities.

In a Saturday tweet, Trump accused Democrats of “holding our Military hostage over their desire to have unchecked illegal immigration.”

The president retweeted that message early Sunday.