WASHINGTON - Joe Biden's top aide said Saturday the incoming president would sign about a dozen executive orders on his first day in office, as police fearing violence from Trump supporters staged a nationwide security operation ahead of the inauguration.

Authorities in Washington, where Wednesday's inauguration will take place, said they arrested a man with a loaded handgun and more than 500 rounds of ammunition at a security checkpoint, underscoring the tension in the US capital which is resembling a war zone.

However, the man's family told US media he was a security guard, rejecting the idea he was intent on causing harm.

Incoming Biden chief of staff Ron Klain said in a memo to new White House senior staff that the executive orders would address the pandemic, the ailing US economy, climate change and racial injustice in America.

"All of these crises demand urgent action," Klain said in the memo.

"In his first ten days in office, President-elect Biden will take decisive action to address these four crises, prevent other urgent and irreversible harms, and restore America's place in the world," Klain added.

As he inherits the White House from Donald Trump, Biden's plate is overflowing with acute challenges.

The US is fast approaching 400,000 dead from the Covid-19 crisis and logging well over a million new cases a week as the coronavirus spreads out of control.

The economy is ailing, with 10 million fewer jobs available compared to the start of the pandemic.

Biden this week unveiled plans to seek $1.9 trillion to revive the economy through new stimulus payments and other aid, and plans a blitz to accelerate America's stumbling Covid vaccine rollout effort.

On Inauguration Day Biden, as previously promised, will sign orders including ones for the US to rejoin the Paris climate accord and reverse Trump's ban on entry of people from certain Muslim majority countries, Klain said.

"President-elect Biden will take action -- not just to reverse the gravest damages of the Trump administration -- but also to start moving our country forward," Klain said.

AFP