Hennepin County Sheriff's Office

(BLOOMINGTON, Minn.) -- A Minnesota Republican state senator was charged on Wednesday with soliciting a minor, according to federal prosecutors.

Justin David Eichorn, the Republican state senator for District 6, was arrested on Monday after communicating online with who believed to be a 17-year-old girl, but in reality was a police officer, officials said in a statement on Tuesday.

Law enforcement placed online advertisements offering commercial sex, and Eichorn began sending messages, saying, "I saw your post and (sic) chance you are still available tonight?" and "What's a guy gota do to get with the hottest girl online tonight."

The undercover officer -- posing as a teenage girl -- repeatedly said she was not 18, and Eichorn still "proceeded to ask the undercover officer about pricing for various sex acts she might perform," federal prosecutors said.

After the detective arranged to meet with Eichorn on Monday in Bloomington, Minnesota, the 40-year-old lawmaker arrived in a pickup truck and was "arrested without incident," police said.

The senator was booked into the Bloomington Police Department jail and was transported to Hennepin County Adult Detention Center, police said.

"As a 40-year-old man, if you come to the Orange Jumpsuit District looking to have sex with someone's child, you can expect that we are going to lock you up," Bloomington Police Chief Booker Hodges said in a statement.

Hodges also urged state legislators to "take this case and this type of conduct more seriously."

Eichorn was charged with one count of attempted coercion and enticement of a minor, federal prosecutors said.

"The U.S. Attorney's Office has no tolerance for public officials who violate federal law -- particularly those laws meant to protect children," said acting U.S. Attorney Lisa D. Kirkpatrick. "I am grateful to the Bloomington Police Department, to the FBI and to all law enforcement officers who use undercover operations to identify and arrest child sex predators to prevent them from abusing real children."

After Eichorn's arrest, both Republican and Democratic lawmakers in Minnesota have called for his resignation.

"We are shocked by these reports and this alleged conduct demands an immediate resignation. Justin has a difficult road ahead and he needs to focus on his family," Minnesota Senate Republicans said in a statement.

House Republican leaders Speaker Lisa Demuth and Leader Harry Niska also demanded for Eichorn's resignation.

"Given the seriousness of the charges, Senator Eichorn should resign. While he is entitled to due process, we must hold legislators to a higher standard," Demuth and Niska said in a joint statement.

The Minnesota Democratic-Farmer-Labor Party also condemned Eichorn's actions, saying "no one who solicits children belongs anywhere near public office or the State Capitol."

"The facts presented by the Bloomington Police Department make it clear that Senator Eichorn is an immediate danger to the public and must resign immediately," Minnesota DFL Executive Director Heidi Kraus Kaplan said in a statement.

Eichorn was also one of the senators to recently introduce a bill labeling "Trump Derangement Syndrome" as a form of mental illness.

The bill defines "Trump Derangement Syndrome" as "acute onset paranoia in otherwise normal persons that is in reaction to the policies and presidencies of President Donald J. Trump."

Symptoms for "Trump Derangement Syndrome" include "verbal expressions of intense hostility" toward Trump and "overt acts of aggression and violence against anyone supporting" Trump or anything that symbolizes Trump, the bill said.

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