'Non-scalable' fence erected outside the White House in anticipation of Election Day unrest in Washington, DC

Federal authorities have erected a massive 'non-scalable' fence outside the White House in anticipation of Election Day unrest in Washington, DC. 

The Heavy-duty barricades spanning roughly 8,800 feet went up on Monday afternoon, blocking off the Ellipse, a large green area south of the White House, and Lafayette Square to the north, NBC News reported.

Metro Police in Washington has also put 250 National Guardsmen on standby ahead of expected demonstrations.

The security measures come as President Donald Trump prepares to hold a massive indoor election night party at the White House. 

According to reports, the guest list for Trump's party includes 400 of his closest allies, advisers, and loyalists.