Joe Biden called on the US Congress to take steps to reform police forces this month after George Floyd's death.

"The time has come for our country to address systematic racial discrimination, address growing economic inequality, and to fail to fulfill the commitments it has made to so many people.

He called on Senate majority leader Mitch McConnell to pass a bill on police force reform, a bill that prohibits choking acts.

"Don't make more excuses and delay," Biden said.

The former vice president has pledged that if elected by the end of the year, he "will not spread fear and division, nor ignite the flame of hatred" and at the same time "set up a force oversight committee."

He also condemned President Donald Trump dispatching police to tear gas, firing rubber bullets at peaceful protesters to walk to the church near the White House and take photos.

"When that happens, we can believe that the President is more interested in power than in principle, preferring to satisfy personal desires rather than people's needs," Biden said.

Trump announced the mobilization of thousands of heavily armed army troops, along with defense workers and law enforcement officers to prevent riots and foulances during the protest.