President TrumpDonald John TrumpCould Donald Trump and Boris Johnson be this generation's Reagan-Thatcher? Merkel backs Democratic congresswomen over Trump How China's currency manipulation cheats America on trade MORE touted the unity of his party on Friday as the partial shutdown of the federal government reached its 28th day.

In a tweet, Trump pledged that Republicans would not "Cave" on his demand for more than $5 billion for a border wall, and faulted Democrats for supporting what he calls "Open Border, High Taxes and Crime" policies.

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"Never seen the Republican Party so unified. No 'Cave' on the issue of Border and National Security," Trump said.

"A beautiful thing to see, especially when you hear the new rhetoric spewing from the mouths of the Democrats who talk Open Border, High Taxes and Crime. Stop Criminals & Drugs now!" the president added.

Negotiations between Democrats and the White House have stalled as the shutdown appears likely to cross the one-month mark, with Democrats unwilling to budge on providing funding for the wall and the White House refusing to reopen other parts of the government until the Department of Homeland Security receives funding for the wall's construction.

Tensions have only intensified this week, with Speaker Nancy PelosiNancy PelosiDHS chief to Pelosi: Emergency border funding 'has already had an impact' The Hill's Morning Report: Trump walks back from 'send her back' chants Trump faces new hit on deficit MORE (D-Calif.) urging Trump to postpone his State of the Union address and the president responding by denying military transport to congressional delegation trips, a move that effectively canceled Pelosi's planned trip this week to Afghanistan.