President Donald Trump said Sunday he is willing to allow a government shutdown if Congress, specifically Democrats, do not support "border security."

What did Trump say?

The president said that Democrats need to get onboard with his immigration agenda, which includes a wall on the U.S.-Mexico border, or risk another government shutdown.

Trump's threat came just days after he met with House Speaker Paul Ryan (R-Wis.) and Senate Majority Leader Mitch McConnell (R-Ky.), who pitched him a plan to minimize the threat of a government shutdown in September. According to Politico, Trump was "receptive" to their plan.

Trump has previously floated the idea of a government shutdown over border security funding.

He said in February that he would "love to see a shutdown" if Congress did not fund border security. Ultimately, Trump signed a $1.3 trillion spending bill in March, which keeps the government running through Sept. 30. However, Trump vowed to never sign another bill like it again.

The government has already faced a lapse in appropriations twice this year.

In January, the government shut down as congressional Democrats fought Republicans on protections for "Dreamers." And in February, the government shut down for several hours when Sen. Rand Paul (R-Ky.) opposed government spending increases.

A third lapse, however, is unlikely after McConnell cancelled most of the Senate's August recess to give senators more time to confirm various Trump nominees and consider spending bills.