Trump ends DHS' months-long nightmare that left immigration enforcement without funding

Notably, however, U.S. Immigration and Customs Enforcement (ICE) and U.S. Customs and Border Protection (CBP) will remain unfunded under the current legislation.

Johnson changed course this week after the White House appeared to side with the Senate and urged swift passage of the upper chamber's bill. 

With more than 200,000 personnel, DHS is one of the largest government agencies under the executive branch. In addition to ICE and CBP, several of the nation's most critical government agencies fall under DHS, including Secret Service, Transportation Security Administration (TSA), U.S. Coast Guard, the Federal Emergency Management Agency (FEMA) and others.

At roughly 75 days, the DHS funding lapse was the longest recorded partial government shutdown in U.S. history.

In an internal memo sent to Hill offices and obtained by Fox News Digital, the White House warned it would not be able to pay employees starting in May if the House did not pass the Senate's partial DHS bill. The administration since early April had been using existing funds to cover six weeks of back pay and a new pay period for DHS employees - but warned that money was quickly being depleted.

Republicans are in the beginning stages of writing a separate party-line package to fund Immigration and Customs Enforcement (ICE) and Customs and Border Protection (CBP). But that legislation will not advance before lawmakers leave Washington for the upcoming recess period. 

Fox News Digital's Adam Pack and Krista Garvin and Fox News' Bill Melugin contributed to this report.