The Texas lawmaker accused of big-footing her way into a first-class airline seat has a long history of boorish behavior — on the ground as well as in the air.

Democratic Rep. Sheila Jackson Lee regularly plays the race card when criticized and treats her staffers so badly that she was once named the meanest member of Congress by Washingtonian magazine.

According to the Houston Chronicle, she also beat out then-House Speaker Nancy Pelosi for the “Biggest Drone” category and was also voted “Biggest Windbag” from 1998 through 2006, except for 2000 when the category wasn’t included.

She was also named top “Show Horse,” a category she had won every two years from 1998 to 2008.

Jackson Lee’s latest misadventure occurred when United Airlines booted Washington, DC, teacher Jean Marie Simon, 63, from a first-class seat she had booked in advance and gave the cushy space to Lee.

An outraged Simon called out Jackson Lee on social media — and the 22-year veteran Houston lawmaker responded by lashing out at Simon.

“Since this was not any fault of mine, the way the individual continued to act appeared to be, upon reflection, because I was an African American woman, seemingly an easy target,” she wrote on Twitter.

It wasn’t the first time that the combative Lee — a graduate of Yale University and the University of Virginia Law School — freaked out in flight.

In 1998, she blew a gasket when she couldn’t get seafood on a Continental flight.

“Don’t you know who I am? I’m Congresswoman Sheila Jackson Lee! Where is my seafood meal? I know it was ordered!” she bellowed.

David Martosko, US political editor for the Daily Mail, said on Twitter that he personally witnessed Jackson Lee melt down on another flight.

“I saw Sheila Jackson Lee on a domestic flight two years ago. While I was walking back to coach, she was throwing a hissy fit in First Class over why the steward had to gate-check her carry-on. (It was too big to fit in the overhead.) She threw a tantrum worthy of a 3-year-old,” he wrote.

Jackson Lee, 67, has also developed a reputation as the boss from hell, treating her congressional staffers like chattel and abusing them to the point that many fed-up aides have quit in disgust.

“I am a queen, and I demand to be treated like a queen,” she once declared to an underling.

The Houston Press reported in 1998 that five of Lee’s staffers quit in disgust that spring. In 2011, the Huffington Post and Houston Chronicle reported that she had gone through 11 chiefs of staff in 11 years.

That same year, the Daily Caller reported that she routinely referred to one staff member as “You stupid motherf—er,” threw her cellphone at another and demanded to be driven when traveling between House office buildings, which are connected by tunnels.

Jackson Lee also has a comical history of off-the-wall statements — including a number when she’s played the race card.

In 2010, while commenting on the war in Afghanistan, the geographically challenged lawmaker seemed confused about the history of Vietnam.

“Today, we have two Vietnams, side by side, North and South, exchanging and working. We may not agree with all that North Vietnam is doing, but they are living in peace,” she said.

The countries united in 1975 after the Vietnam War.