Move comes as spectre of political violence has grown in the US, with Trump facing two campaign assassination attempts.

United States President Donald Trump has revoked Secret Service protection for his political opponent, former Vice President Kamala Harris, White House officials have told several news agencies.

The change revealed on Friday means that Harris will lose protection from the federal law enforcement agency on September 1, according to the reports.

Former vice presidents are typically afforded six months of Secret Service protection upon leaving office, but former President Joe Biden had quietly signed a directive extending protection for his deputy shortly before his term ended in January.