The final day of campaigning is in full swing ahead of the midterm elections in the United States. Millions of Americans have already cast ballots in early voting. But with the balance of power at stake in the US Congress -- emotions are high and each side is urging people to get out and vote. CGTN White House Correspondent Nathan King reports.  

"GET OUT IN 2018 Because you are voting for me in 2018."

Whether the Republicans like it or not, US President Trump has made these midterms elections all about himself.

At rally after rally he works up his supporters - barely mentioning the candidates that are actually running for office and his supporters love it.

STEPHANIE LINDSEY TRUMP SUPPORTER "President Donald Trump, I, in my lifetime, is the best president I've ever known."

DENNIS DEIBEO TRUMP SUPPORTER "I'm here to support President Trump and show my respect and I'm here to see what's gonna to go on with our future here."

It's Trump's party now- and while that may be good at energizing the Republican base in a bid to get them out to vote. There are some downsides to having Trump be a campaigner in chief.

With unemployment at near 50 year lows, many Republicans feel that this election should be about the strength of the US economy. They've also appointed two supreme court judges in 2 years and cut regulation and passed a big tax cut- but Trump is campaigning on immigration, in fact, more on the fear of immigration- focusing on a caravan of migrants from Mexico still months from the US border.

DONALD TRUMP US PRESIDENT "It's like an invasion. They have violently overrun the Mexican border. You saw that two days ago. These are tough people in many cases. A lot of young men, strong men and a lot of men that maybe we don't want in our country. They've overrun the Mexican police, and they've overrun and hurt badly Mexican soldiers. So this isn't an innocent group of people."

Being tough on immigration helped Trump become President and while it works to energize a portion of his supporters, it may do Republicans more harm than good especially in districts where Republicans need broad support to keep control of the House of Representatives. Polls are putting the President's party behind in the run-up to the elections- but he has defied the pols before.

NATHAN KING WASHINGTON DC "By focusing on the emotional issue of immigration, Trump thinks he can at least keep the US Senate Republican. The senate is key as it confirms Supreme Court Justices and key Cabinet Official Trump will need in the next two years. But if his party loses both Houses, the party could be over for Trump and his status as the undisputed leader of the Republican party will surely be challenged."

Nathan King, CGTN, Washington.