"She needs to decide: does she want to be an effective legislator or just continue being a Twitter star?" said one House Democrat.

New U.S. Congresswoman Alexandria Ocasio-Cortez, known for her anti-establishment views, has started making enemies in the House Democratic Caucus due to her confrontational practices.

Nicknamed AOC, Ocasio-Cortez is a Democratic Socialist, supported by a strong grassroots base, and has 2.2 million Twitter followers.

She is known for her left-leaning proposals as a senator and she will defend them against anybody, Democrat or Republican. During her first few weeks she has already proposed an increase in taxes on the rich, Medicare for all and her emblematic proposal known as the Green New Deal.

Some members of the House Democratic Caucus are now planning to bring her to heel because she has been confrontational with the corporate leaders of the Democratic Party.

For some, it means she can use her notoriety to challenge the Republicans; others feel that if she does not stop arguing with Democrats, she will be very lonely in Congress.

AOC has used social media and her position to confront corporate leaders trying to reach deals with Republicans or pass neoliberal laws.

“I’m sure Miss Cortez means well, but there is almost an outstanding rule: don’t attack your own people. We just don’t need sniping in our Democratic Caucus,” said Emanuel Cleaver, a member of the U.S. House of Representatives for Missouri.

Incumbent Democrats are also annoyed with AOC due to her threats to back primary opponents against members of the Democrat party she thinks are too moderate for what the United States needs.

According to Politico, a House Democrat aligned with Ocasio-Cortez's ideology said: "She needs to decide: does she want to be an effective legislator or just continue being a Twitter star? There’s a difference between being an activist and a lawmaker in Congress.”

However, Ocasio-Cortez, the youngest U.S. Congress Member, was elected and also won the primaries for her activism and her work with grassroots bases, and also for not playing by the "normal" corporate rules.

By those same standards, she is trying to bring the Democratic Party in line with her principles, attacking members she deems too moderate.

“I think she needs to give herself an opportunity to know her colleagues and to give herself a sense of the chemistry of the body before passing judgment on anyone or anything,” said Yvette Clarke, Democrat representative from New York.