Former FBI Director James Comey revealed his secret Twitter account on Monday with a photo of himself standing in the middle of an Iowa country road.

The location of the photo, and the fact that Comey was wearing a pair of running shoes, set off speculation — both serious and not-so-serious — that Comey is planning a run for president.

Goodbye Iowa. On the road home. Gotta get back to writing. Will try to tweet in useful ways. pic.twitter.com/DCbu3Yvqt3 — Reinhold Niebuhr (@FormerBu) October 23, 2017

“Goodbye Iowa. On the road home. Gotta get back to writing. Will try to tweet in useful ways,” wrote Comey, who was fired by Trump on May 9 as FBI chief.

WATCH:

It is unclear why Comey was in Iowa. Comey, who is working on a book about his FBI career, has not publicly discussed having any future political plans. But the cryptic post carried enough well-placed clues to set off speculation of a presidential bid.

“He’s running!” was a typical tongue-in-cheek response on Twitter to Comey’s post.

Comey, who tweets under a handle with the name of theologic Reinhold Niebuhr, has posted six times to Twitter. He posted the following last week from Gettysburg, Pennsylvania.

Little Round Top, Gettysburg. Good place to think about leadership and values. pic.twitter.com/o1cKBXrLCl — Reinhold Niebuhr (@FormerBu) October 19, 2017

“Good place to think about leadership and values,” wrote Comey.

Follow Chuck on Twitter