Fox News contributor Tomi Lahren fired back at the genealogist who investigated her family tree following her comments about undocumented immigrants.

“There is a woman over the weekend who took it upon herself to research my family history in hopes of digging up some kind of a ‘gotcha’ moment, a ‘gotcha’ angle to validate illegal immigration and open borders,” Lahren said on the network Thursday.

The results were shocking, Lahren joked to the co-hosts of “Fox & Friends.”

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“She found that my family who came here in the 1800s from Norway and Germany — that they spoke Norwegian and German,” Lahren said.

The genealogy report came from Jennifer Mendelsohn, the creator of the "Resistance Geneaolgy" campaign, which highlights the family backgrounds of people who criticize immigrants.

Mendelsohn said she dug into Lahren’s family history after the conservative commentator said on Saturday that the U.S. is not a country based on people who come to it with “low skills, low education” and “not understanding the language.”

.@TomiLahren: "You don't just come into this country with low skills, low education, not understanding the language and come into our country because someone says it makes them feel nice. That's not what this country is based on." @WattersWorld pic.twitter.com/Dux0cABHar — Fox News (@FoxNews) May 13, 2018

“Tomi's 3x great-grandmother had been here for 41 years and still spoke German,” Mendelsohn wrote in response. “Her 2nd great-grandmother had been here for 10 yrs. Spoke no English. Her great-grandfather's 1895 baptism from MN? Recorded in Norwegian.”

Except the 1930 census says Tomi's 3x great-grandmother had been here for 41 years and still spoke German.



Her 2nd great-grandmother had been here for 10 yrs. Spoke no English.



Her great-grandfather's 1895 baptism from MN? Recorded in Norwegian.#resistancegenealogy #receipts pic.twitter.com/rIySFu6fvL — Jennifer Mendelsohn (@CleverTitleTK) May 13, 2018

Lahren said Mendelsohn only proved that her family came to the U.S. legally.

“But what she was trying to do was call my a hypocrite for believing in merit-based immigration. Again, she failed miserably," Lahren said.

Mendelsohn also shared a document in September that she said shows Lahren’s great-great-grandfather was indicted by a grand jury for forging naturalizations.

She added that he was later acquitted by a trial jury.

Law-abiding citizens like her great-great-grandfather, indicted by a grand jury for forging naturalization papers? https://t.co/1g9T93E431 pic.twitter.com/pY7ng0AJU5 — Jennifer Mendelsohn (@CleverTitleTK) September 4, 2017

Lahren called on Mendelsohn to investigate Sen. Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE's (D-Mass.) ancestry next.

President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE often pokes at Warren’s claim that she has Native American heritage and has derisively called her “Pocahontas.”