It seems DC isn't the only place Chuck Schumer likes to argue.

The top Democrat in the Senate has been accused of lashing out over dinner at a popular Manhattan restaurant on Sunday night.

Schumer reportedly lost his cool after bumping into Joseph A. Califano Jr - secretary of health, education and welfare under Jimmy Carter as well as domestic policy adviser to Lyndon Johnson - and his wife, Hilary.

What set the Democrat off was the fact Hilary voted against Hillary and for Donald Trump in last year's election - despite her husband's decorated history with Schumer's party, the New York Post reports.

Chuck Schumer, the Senate leader for the Democrats, has been accused of having a massive bust-up with the wife of a powerful figure in his party after she revealed she voted for Trump

'Sen. Schumer was really rude... He’s our senator, and I don’t really like him,' she told the Post.

'Yes, I voted for Trump. Schumer joined us outside and he told me Trump was a liar.

'I should have told him that Hillary Clinton was a liar, but I was so surprised I didn’t say anything.'

However, another person dining in the restaurant on Friday night disputed claims of any altercation.

Schumer reportedly lost his cool after bumping into Joseph A. Califano Jr (left) and his wife, Hilary (middle)

Califano Jr was secretary of health, education and welfare under Jimmy Carter as well as domestic policy adviser to Lyndon Johnson

'It was a pleasant conversation. Joe said the senator was doing a good job on healthcare,' the second witness told the Post.

'Joe joked that Hilary voted for Trump. The conversation continued outside because everyone left at the same time.'

A third witness appeared to corroborate the account of what happened, telling the newspaper Schumer first started shouting inside the restaurant, before following the couple out into the street.

The alleged incident was said to have taken place at the Upper East Side restaurant, Sette Mezzo (pictured)

Schumer's team denied the reports of an ugly incident, saying instead the Senator had 'unremarkable conversation with patrons who approached (his) table'

He then kept saying, 'He's a liar' and 'how could you vote for him?', according to the witness.

Schumer's team denied the reports of an ugly incident, saying instead: '[He] and his wife ate at the café on Sunday, engaging in unremarkable conversation with patrons who approached their table.

'There were no heated exchanges with ‎anyone.'