Missouri Attorney General Josh Hawley, the presumptive Republican nominee for Senate, could be drawn into the investigation into Gov. Eric Greitens, who was indicted Thursday by a grand jury on charges relating to allegations of sexual impropriety.

Republican insiders are fretting that the Greitens affair could put undo political strain on Hawley’s bid to unseat Sen. Claire McCaskill, D-Mo., who is vulnerable in the midterm but is a tough campaigner. Hawley, in his position as state attorney general, could be asked to assist in the Greitens probe by local prosecuting attorneys, and plans to answer the call if it comes.