Donald Trump and Kamala Harris are “deadlocked” just two weeks out from the US presidential election as Trump gains ground, according to major national polls.

The final New York Times and Sienna College poll on Friday (US time) showed both candidates receiving 48 per cent of the popular vote.

CNN’s final poll also showed the results on a razor’s edge, with 47 per cent of voters supporting Vice President Harris and 47 per cent supporting former President Trump.

Both candidates are hitting the hustings in a down-to-the-wire blitz to mobilise voters ahead of Election Day on November 5.

Support for Harris in the New York Times poll was a slip from her lead of 49 per cent to Trump’s 46 per cent in the last poll in October.

NYT said the results were “not encouraging” for Harris because Democrats have in the last four elections had an advantage in the popular vote, even when they have lost the White House.

The economy was the most important issue to voters, with Trump having an edge over Harris, although his lead was reduced from 13 points to six since last month.

Trump’s signature issue of immigration was important to 15 per cent of respondents, up from 12 per cent in the last poll.

Harris leads among female voters, with 54 per cent to Trump’s 42 per cent.

Trump is favoured by male voters, 55 per cent to Harris’s 41 percent.

Beyonce rallies for Harris

Harris and Trump will both centre their attention on Texas on Friday (US time).

Harris will campaign alongside pop star Beyoncé and shine a light on abortion issues at a rally in the solidly Republican state where abortion is restricted.

Trump is also headed to Texas where he’ll talk immigration, and tape a podcast with host Joe Rogan.

Harris will be joined at her rally by women who have nearly died from sepsis and other pregnancy complications because they were unable to get proper medical care, including women who never intended to end their pregnancies.

“Sadly, the elected leaders of Texas have made Texas ground zero in this fundamental fight for the freedom of women to make decisions about their own bodies,” Harris said.

Harris is banking on abortion rights as a major driver for voters — including for Republican women, particularly since Trump appointed three of the Supreme Court justices who voted to overturn the constitutional right.

He has been inconsistent about how he would approach the issue if voters return him to the White House.

Harris’s campaign has taken on Beyonce’s 2016 track “Freedom” as its anthem, and the message dovetails with the vice president’s emphasis on reproductive freedom.

The singer’s planned appearance adds a high level of star power to Harris’s visit to the state.

She will be the latest celebrity to appear with or on behalf of Harris, including Lizzo, James Taylor, Spike Lee, Tyler Perry, Samuel L. Jackson, Bruce Springsteen and Eminem.

While in Texas, Harris also will tape a podcast with host Brené Brown.

Leonardo DiCaprio is also endorsing Harris for president, with the Oscar-winning actor expressing support for the Democratic nominee in a video Friday.

“Climate change is killing the earth and ruining our economy, we need a bold step forward to save our economy, our planet and ourselves,” DiCaprio said in the video posted to Instagram.

“That’s why I’m voting for Kamala Harris.”

Harris was previously in the battleground state of Georgia for a star-studded rally with rock legend Bruce Springsteen and former president Barack Obama.

-with AAP