Pro-Trump singer accuses Lewandowski of unwanted touching

Joy Villa says she has filed a sexual assault complaint against US President Donald Trump's former campaign manager. Photo / AP file

A singer and potential congressional candidate says she has filed a sexual assault complaint against US President Donald Trump's former campaign manager.

Joy Villa claims Corey Lewandowski hit her twice on her buttocks during a Washington gathering in November.

Villa, a Trump backer who wore a 'Make America Great Again' dress at the Grammys this year, said she plans to meet detectives in Washington next week about the complaint against Lewandowski.

"I didn't know him at all," Villa said about Lewandowski.

"I only knew him by reputation. He broke my trust."

She said she saw him at a gathering at the Trump International Hotel on the day after Thanksgiving, and said Lewandowski struck her "extremely hard" even after she told him to stop.

She said she felt it was "disgusting and shocking and demeaning".

Lewandowski did not respond to an email seeking comment.

This is not the first time Lewandowski has faced police charges.

In March 2016 he was charged with misdemeanour battery for an altercation involving a female reporter after a news conference in Florida.

The charges were later dropped.

Trump fired him as campaign manager in June 2016.

Corey Lewandowski, the former campaign manager for US President Donald Trump. Photo / AP file

- AP, AAP