California Democratic Sens. Dianne Feinstein Dianne Emiel FeinsteinBiden leads Trump by 12 points among Catholic voters: poll Names to watch as Trump picks Ginsburg replacement on Supreme Court McConnell says Trump nominee to replace Ginsburg will get Senate vote MORE and Kamala Harris Kamala HarrisJoe Biden looks to expand election battleground into Trump country Fox's Napolitano: Supreme Court confirmation hearings will be 'World War III of political battles' Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE are calling for a probe into U.S. Immigration and Customs Enforcement (ICE) after a spokesman resigned over what he called false statements from the Trump administration about federal raids in California.

Feinstein and Harris wrote a letter Thursday to the Department of Homeland Security's acting Inspector General, John Kelly John Francis KellyMORE, urging an investigation into the resignation of James Schwab, the San Francisco spokesman for ICE until last week.

Schwab resigned last week, telling the San Fransisco Chronicle he was frustrated by official statements blaming Oakland Mayor Libby Schaaf (D) for tipping off hundreds of immigrants in the country illegally about upcoming raids.

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"We have serious concerns that Trump administration officials are misrepresenting the facts and statistics surrounding this enforcement action for political purposes," the two California senators wrote Thursday.

"ICE has since reversed its previous statements, saying it 'can't put a number on how many targets avoided arrest' due to Mayor Schaaf's alert," they wrote.

“Public policies and law enforcement operations must be informed by facts,” the letter continues, “not the fabricated overstatements or distortions of political officials.”

Acting ICE Director Thomas Homan derided the mayor's efforts as "irresponsible" at the time, and Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE claimed earlier this month that Homan told him that as many as 800 people avoided the sting as a result of her comments.

“ICE failed to make 800 arrests that they would have made if the mayor had not acted as she did. Those are 800 wanted aliens that are now at large in that community," Sessions said.

President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE referenced the number the next day, which he said was "close to 1,000."

During the four-day operation, ICE made 232 arrests. Schwab reportedly believed the number of immigrants who avoided the sting to be much lower than 800, and was uncomfortable with orders to "deflect" questions about the figure from the media.

“I quit because I didn’t want to perpetuate misleading facts,” Schwab told the Chronicle. “I asked them to change the information. I told them that the information was wrong, they asked me to deflect, and I didn’t agree with that. Then I took some time and I quit."