CBS cut away from Donald Trump's televised addressed to return to the 'Price is Right' which is normally broadcast at that time.

All of the broadcast and cable news networks carried the declaration and press conference that followed on Friday afternoon.

Only CBS decided to cut away after 21 minutes before the event was finished, The Hill reported.

CBS cut away from Donald Trump's televised addressed to return to the 'Price is Right' which is normally broadcast at that time

Trump was speaking on Friday morning from the Rose Garden of the White House to announce he was declaring a national emergency at the border to build barriers to guard against illegal immigration.

'I am going to be signing a national emergency,' Trump said after the announcement was delayed from its original 10.30am start.

'It’s a great thing to do because we have an invasion of drugs, invasion of gangs, invasion of people,' the president said in seeking to justify the need for an emergency declaration.

The networks confirmed that they would carry the speech, which comes amidst the ongoing partial government shutdown, on Thursday.

Four years ago, all the broadcast networks declined to air a prime-time address on immigration from President Barack Obama because its content was considered too 'overtly political.'

CBS News reported that the White House has assured the network Trump’s speech will run no longer than eight minutes.

Trump started to speak at 1.10pm and finished at 2pm, which meant the speech was longer than expected.

Donald Trump delivered his speech in which he announced a national emergency on the border on Friday which lasted approximately 50 minutes

CBS cut to the Price is Right with host Drew Carrey (pictured) 21 minutes into Trump's speech

On Monday Speaker of the House Nancy Pelosi and Senate Minority Leader Chuck Schumer issued a statement saying the Democrats must immediately be given equal airtime' and claiming Trump's address will likely be filled with 'malice and misinformation.'

Trump announced a national emergency on the border on Friday, a move calculated to allow him to spend $8 billion building his wall after signing a bill to avoid a second government shutdown after a bitter standoff with Congress.

Social media users watching the address on CBS were quick to notice Trump was cut short

Pelosi and Schumer claimed in a joint statement that there is no 'crisis' on the U.S.-Mexico border, and threatened to defend the spending power of Congress with every tool at their command.

'The President's unlawful declaration over a crisis that does not exist does great violence to our Constitution and makes America less safe, stealing from urgently needed defense funds for the security of our military and our nation,' they said.

'This is plainly a power grab by a disappointed President, who has gone outside the bounds of the law to try to get what he failed to achieve in the constitutional legislative process.'