Kamala Harris speaks out about her fear of Donald Trump

As former US President Donald Trump leads the primary race of the Republican party, bringing him closer to the White House, Vice President Kamala Harris expressed her fear about the 77-year-old GOP nominee saying she is "scared as heck".

Kamala Harris, while speaking to The View talk show on the ABC network, also urged Democrats to resist Donald Trump's return.

She remarked days after the four-time-indicted former president secured a landslide victory in the Republican caucuses held in Iowa, completing the first step to face President Joe Biden in November this year.

"I am scared as heck, which is why I'm traveling our country... we should all be scared," the 59-year-old said during an all-female-hosted talk show.

However, expressing her confidence to fightback, she noted: "We don't run away from something when we're scared, we fight back against it."

Harris was responding to a question about reports former president Barack Obama was concerned with the Joe Biden campaign, and to comments by ex-first lady Michelle Obama saying she was "terrified" of a second Trump term.

Biden has stepped up direct attacks on Trump recently, warning that the twice-impeached former president — who faces 91 criminal indictments — poses a threat to US democracy.

The president's reelection campaign has been giving Harris an increasingly prominent role as it seeks to mobilise Black, female and young voters for this year's election.

Harris is a triple-trailblazer as the first female, first Black and first South Asian vice president, and has been a big fundraising draw for Democrats.

But she suffers from low approval ratings and is a repeated target for Republican attacks saying she's unqualified to take over as president if anything happened to the 81-year-old Biden.

Next week Harris will embark on a nationwide tour to promote reproductive freedoms as Democrats seek to make abortion rights a key issue in the 2024 race.

Harris kicks off the tour in the pivotal swing state of Wisconsin on Monday, coinciding with the 51st anniversary of the Supreme Court's Roe v. Wade decision that granted a constitutional right to abortion.

Trump has repeatedly taken credit for the court overturning the landmark ruling last year, as he appointed a series of conservative judges to the bench during his first term.

Harris received praise on her abortion messaging from an unlikely quarter — Trump's former press secretary Kayleigh McEnany.

"What Kamala is doing, right or wrong, is very powerful among young women," she told Fox News.