(CNN) President Donald Trump's former chief physician, Rear Adm. Ronny Jackson, filed on Monday to run for Congress in Texas' 13th District.

Jackson filed his paperwork Monday afternoon at the Republican Party of Texas' headquarters in Austin, the group's communications director, Sam Pohl, confirmed to CNN.

Dwrena Allen, spokeswoman for the inspector general, confirmed to CNN on Monday that the Pentagon inspector general's investigation into Jackson remains ongoing. CNN has reached out to Jackson for comment.

A Texas native, Jackson is running as a Republican in the 13th District, which opened after longtime GOP incumbent Rep. Mac Thornberry announced his retirement in September. Trump won the district by 63 points in 2016.

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