Watch: Obama 'guaranteed' no involvement in any DOJ or FBI investigation

In 2016, then-President Barack Obama told "Fox News Sunday" host Chris Wallace he could "guarantee" that he had no discussions about or influence over any FBI or Justice Department investigations, including the investigation into former Secretary of State Hillary Clinton's use of a private email server.

But the latest release of text messages between FBI agent Peter Strzok and FBI lawyer Lisa Page has raised questions about Obama's involvement in the Clinton email investigation, Senate investigators told Fox News.

In one of the text messages released by the Senate Homeland Security and Governmental Affairs Committee, Page wrote to Strzok on Sept. 2, 2016: “Potus wants to know everything we’re doing.”

Strzok and Page worked at one point for special counsel Robert Mueller on the investigation of alleged interference between Russia and the Trump campaign. Strzok was removed from the probe in August 2017, and Page was removed from Mueller's team in September 2017.

What did Obama say in the interview?

In an interview on April 10, 2016, Wallace asked Obama about Clinton's use of her personal server to send classified emails.

Wallace asked whether Obama would give a directive to Attorney General Loretta Lynch to treat Clinton based on evidence and not give her protections.

"I can guarantee that. And I can guarantee that, not because I give Attorney General Lynch a directive, that is institutionally how we have always operated. I do not talk to the Attorney General about pending investigations. I do not talk to FBI directors about pending investigations. We have a strict line, and always have maintained it as president," Obama told Wallace.

"So, just to button this up ... " Wallace said.

"I guarantee it," Obama confirmed.

"You ... " Wallace started to ask another question, but Obama cut him off.

"I guarantee that there is no political influence in any investigation conducted by the Justice Department, or the FBI, not just in this case, but in any case," Obama said.

"And she will be ... " Wallace said.

"Full stop. Period," Obama said in an agitated tone.

"And she will be treated no different?" Wallace asked.

"Guaranteed. Full stop. Nobody gets treated differently when it comes to the Justice Department because nobody is above the law," Obama assured Wallace.

"Even if she ends up as the Democratic nominee?" Wallace asked.

"How many times do I have to say it, Chris? Guaranteed," Obama said.