Congressional Democratic leadership sent a warning shot to Republicans on Monday saying it would be the "height of irresponsibility and political cynicism" if they reject a plan to end the 10-day government shutdown.

House Democratic Leader Nancy PelosiNancy PelosiPelosi asks Democrats for 'leverage' on impeachment Is there internet life after thirty? Pelosi says Dems 'have to be ready to throw a punch — for the children' in 2020 MORE (Calif.) and Senate Democratic Leader Charles SchumerCharles (Chuck) Ellis SchumerJewish Democratic congresswoman and veteran blasts Trump's 'disloyalty' comments Schumer says Trump encouraging anti-Semites Saagar Enjeti: Biden's latest blunder; Krystal Ball: Did Schumer blow our chance to beat McConnell? MORE (N.Y.) urged Republicans to back their plan to fully reopen the government or risk being "complicit" in the partial shutdown.

“If Leader McConnell and Senate Republicans refuse to support the first bill, then they are complicit with President TrumpDonald John TrumpDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' EU says it will 'respond in kind' if US slaps tariffs on France Ginsburg again leaves Supreme Court with an uncertain future MORE in continuing the Trump shutdown and in holding the health and safety of the American people and workers’ paychecks hostage over the wall," Pelosi and Schumer said in a joint statement.

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They added that if Senate Republicans vote against the dual approach offered by Democrats, after approving a seven-week stopgap bill by voice vote, it would "be the height of irresponsibility and political cynicism."

Democrats unveiled their spending package on Monday evening and are expected to force votes on the two bills on Thursday, when they gain control of the House. One bill would fund the Department of Homeland Security through Feb. 8. The second bill would merge funding through Sept. 30, the end of the 2019 fiscal year, for the remaining six appropriations bills.

But the package ran into immediate opposition from Senate Republicans and House conservatives.

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' Pelosi asks Democrats for 'leverage' on impeachment Democrats press FBI, DHS on response to white supremacist violence MORE (R-Ky.) isn't expected to bring up a bill for a vote unless it has President Trump's endorsement. Meanwhile, Rep. Mark MeadowsMark Randall MeadowsTrump knocks news of CNN hiring ex-FBI official McCabe Ben Shapiro: No prominent GOP figure ever questioned Obama's legitimacy Trump finds consistent foil in 'Squad' MORE (R-N.C.), a close ally of Trump's, told The Hill that the Democratic plan was a non-starter.

"Several offers have been made both directly and indirectly to Democrats. All of the offers have been met with reluctance and disapproval. Democrats will give zero money for new border barrier construction and Republicans will not accept this position," Meadows told The Hill.

The back-and-forth comes as Washington is locked in a protracted fight over Trump's border wall. 

Trump has demanded $5 billion for the wall, though lawmakers and administration officials have floated that they would accept half of that — roughly $2.5 billion. Democrats, however, are remaining firm at their cap of $1.3 billion for fencing. 

Meanwhile, Trump has lashed out at Democrats through a string of tweets on social media. He said in a tweet on Monday that they were using a “ridiculous sound bite” to say that a wall “doesn’t work.”

“It does, and properly built, almost 100%! They say it’s old technology - but so is the wheel. They now say it is immoral- but it is far more immoral for people to be dying!,” he said.

In another tweet, Trump implored Democrats to return to Washington, saying that he was “in the Oval Office” and Democrats should “come back from vacation now.”

Talks between the White House and congressional Democrats have largely broken down since Congress missed the Dec. 21 deadline to prevent a shutdown that is impacting roughly a quarter of the government. 
 
Pelosi and Schumer blasted Trump on Monday, saying he "sits in the White House and tweets, without offering any plan that can pass both chambers of Congress."