Tuesday will see the US midterms take place, where the Donald Trump presidency may be at stake.

In a final effort to ramp up gain support using racial anxiety and fear, the US President has continually warned of an “invasion” by a caravan of migrants approaching the southern border.

Trump used his Twitter to release his reelection campaign ads, which have been viewed by Facebook and major cable news networks as a racist attack on immigrants and therefore have refused to carry it.

Jesse Ferguson, a Democratic strategist and former spokesman for Hillary Clinton, said: “No one [should] be surprised that the guy who fueled his rise to power on the birther movement is now deploying the next phase of white nationalism to fuel the election of his most loyal Republicans.”

CNN has refused to run the campaign ad, calling it racist. NBC and Fox soon followed.

An NBC spokesman said: “After further review we recognize the insensitive nature of the ad and have decided to cease airing it across our properties as soon as possible.”

When critics asked Trump about the offensive ad, he replied: “A lot of things are offensive. Your questions are offensive a lot of times so, you know.”

The US President has made the caravan a central campaign theme and has described it as an “invasion of our country”.

Barack Obama also made closing arguments on Monday, telling people in Virginia that “the character of this country is on the ballot, who we are is on the ballot”.

There is a lot at stake at the midterms on Tuesday.

“America is at a crossroads. In two days, you get to vote in what I believe will be the most important election of our lifetimes. I know politicians always say that, but this time it’s really true,” said Obama.

“Change is gonna happen. Hope is gonna happen. With each new step we take, hope will spread. Goodness will spread. And you will be the ones who will have done it. It starts with you. Let’s go vote. Let’s go make change. Let’s go make hope.”