Welcome to Washington: Militant Left-Wing Solidcore gym founder hits @IvankaTrump on Facebook. after workout https://t.co/BSejpn2C8r — Laura Ingraham (@IngrahamAngle) February 10, 2017

A Washington-area gym owner called out Ivanka Trump on Facebook after she realized the president's oldest daughter had taken one of her workout classes.

Anne Mahlum, founder of Solidcore, took to Facebook Thursday to let people know she was upset that the mother of three worked out at one of the D.C.-area chains.

She accused President Trump of "threatening the rights" of her customers and employees and said she would request a meeting with Ivanka Trump.

Mahlum wrote:

What you do when you find out Ivanka Trump just took [Solidcore], but used an alias to sign up for class? You reach out and ask for a meeting. While I don’t know her and I always seek to understand … I do know her father is threatening the rights of many of my beloved clients and coaches and as a business owner, I take my responsibility to protect and fight for my people very seriously.

The post has since been deleted.

Mahlum bragged previously about former FLOTUS Michelle Obama taking classes at the gym, Heather Nauert reported this morning.

According to Washington Examiner, Mahlum opened her first Solidcore gym in 2013 and has since expanded across the D.C.-Maryland-Virginia area and to other states.

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Many on social media did not agree with Mahlum outing Mrs. Trump...

Ivanka Trump can't even go to the gym in peace without a liberal owner hounding her. Disgraceful https://t.co/UJ0nUQvrOA — Bo Snerdley (@BoSnerdley) February 10, 2017

Bummer. I really wanted to try out @solidcorestudio and now I definitely won't. https://t.co/hoPyahGyty — Lisa Boothe (@LisaMarieBoothe) February 10, 2017

So founder of gym chain Solidcore discovers Ivanka Trump has taken class and immediately does some anti-Trump virtue-signaling on Facebook. — Byron York (@ByronYork) February 10, 2017

Ivanka can't even go to the gym without drama. That this is counter productive is beside the point. Outright CREEPY. pic.twitter.com/CpLzW7eZUc — Mike Cernovich (@Cernovich) February 10, 2017

It's been a busy week in the news for the president's daughter following the announcement by Nordstrom that it would drop her fashion line.

The company insisted that the decision was based on sales performance, not politics. Still, President Trump lashed out at the company on Twitter for treating Ivanka "unfairly."

Meantime, Neiman Marcus said shoppers will no longer be able to find the first daughter’s jewelry online, while T.J. Maxx and Marshalls reportedly opted not to feature Trump's merchandise in stores.

In an interview on "Fox & Friends" Thursday, Kellyanne Conway implored people to push back on these companies' decisions by purchasing Ivanka's company's products.

Conway was later rebuked by the White House after critics called out her statement as a potential violation of ethics rules. Conway was asked about the matter last night by Martha MacCallum, declaring that President Trump expressed his full support.

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Watch the exchange below.