A former congressman who supports Donald Trump has been scolded for branding Alexandria Ocasio-Cortez a “29-year-old coffee barista”.

MSNBC host Ari Melber hit back at Jack Kingston, an ex-Republican congressman from Georgia, on Tuesday night after he dismissed the congresswoman as a coffeemaker.

Mr Melber was hosting a panel about Mr Trump’s recently leaked private schedules which reveal the US president has spent nearly 60 per cent of his scheduled time in the White House over the last three months enjoying unstructured “executive time”.

The daily schedule, leaked by a White House source, showed clear discrepancies in what the president was said to be doing with his time on paper compared to his reported reality.

Mr Melber said: “Surely you can’t say this is normal presidential scheduling. Your response?”

Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Show all 15 1 /15 Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez greets fellow lawmakers ahead of the State of the Union address Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez participates in an event with Democratic members of Congress EPA Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures The Democrat senator speaks during a news conference at the U.S. Capitol January 30, 2019 Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez and fellow Democrat Rashida Tlaib AP Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez at the Senate chamber to watch two votes on January 24, 2019 Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez arrives with Chellie Pingree at a House Democratic Caucus meeting Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Ocasio-Cortez during Donald Trump's State of the Union address Reuters Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures New York State Assembly member Catalina Cruz with Ocasio-Cortez AFP/Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Nydia Velazquez talks with Alexandria Ocasio-Cortez Reuters Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Ocasio-Cortez casts her vote for Nancy Pelosi as Speaker of the House EPA Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez poses with a campaign worker during a whistle stop in the Queens borough of New York Reuters Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Ocasio-Cortez outside the US Capitol AFP/Getty Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Ocasio-Cortez after casting her ballot in the 2018 midterm general election at a polling site in New York EPA Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Alexandria Ocasio-Cortez looks on during a march organised by the Women's March Alliance in Manhattan Reuters Alexandria Ocasio-Cortez - the Democratic congresswoman in pictures Ocasio Cortez looks on at the Capitol in Washington, DC, on January 16, 2019 AFP/Getty

Mr Kingston replied: “Ari, let me say, No. 1, here we have a 29-year-old coffee barista telling a man who’s made billions of dollars running management and enterprises and investments and real estate all over the globe, and she is going to tell him how to manage the world”.

But Mr Melber interrupted immediately – rebuking him for referring to the rising political star’s background.

“She is not being quoted today based on the fact that she worked on retail or in service,” Mr Melber said.

“She is quoted as a member of congress, the same title as yours. Do you not give her the same respect of the title you held?”

But Mr Kingston, a former Republican congressman from Georgia who was a CNN contributor, appeared to ignore his input and simply applauded Mr Trump.

On Monday, the Hollywood Reporter reported Mr Kingston no longer worked with CNN as the news network had not renewed his contract.

Star Wars actor Mark Hammill voiced anger that Mr Kingston – who is known for stoking controversy and was a senior advisor and spokesperson for the Trump campaign – was on MSNBC a day after leaving CNN.

Ms Ocasio-Cortez, who was dressed in white in an act of solidarity with other women, declined to join a standing ovation for Mr Trump at his State of the Union on Tuesday night despite his purported call for “unity”.

Ms Ocasio-Cortez, who represents New York’s 14th congressional district, worked as a bartender before thrashing Democrat stalwart Joe Crowley – the 10-term representative and then-fourth-ranking Democrat in the House.

The self-avowed socialist, from the South Bronx, has worked as a waitress, children’s book publisher, community activist, a member of the Democratic Socialists of America and volunteered for Bernie Sanders during his 2016 presidential campaign.

She supports abolishing the Immigration and Customs Enforcement agency and the creation of a universal healthcare system.