Washington: US President Donald Trump has declared he's a "nationalist" at a campaign rally on as he appealed to Texas Republicans to re-elect Senator Ted Cruz and help the party keep control of Congress.

Trump ran for president as a nationalist, declaring he would place "America first" in his policies. But he has previously declined to label himself, even telling the Wall Street Journal in an April 2017 interview, "hey, I'm a nationalist and a globalist. I'm both."

US President Donald Trump. Credit:AP

At the time, some members of his administration were considered globalists by their critics, including former National Economic Council director Gary Cohn.

Trump's declaration on Monday, US time, came as he criticised Democrats, associating them with "corrupt, power-hungry globalists".