In fact, no modern court has had a sitting president on a jury. Ronald Reagan came the closest when he was summoned in the 1980s by Santa Barbara County, Calif. He was granted a deferment until he was out of office.

Source 1

Source 2 - Former POTUS G.W. Bush's duty

That photo is good 'ole W actually serving his duty as a juror, so yes!

Relevant Statute(s):

-2 U.S. Code §* 30a - Jury duty exemption of elected officials of legislative branch:

subsection (a): "Notwithstanding any other provision of Federal, State or local law, no elected official of the legislative branch of the United States Government shall be required to serve on a grand or petit jury, convened by any Federal, State or local court, whether such service is requested by judicial summons or by some other means of compulsion."

-28 U.S. Code § 1866 - Selection and summoning of jury panels:

Subsection (c)(1): " excused by the court, or by the clerk under supervision of the court if the court’s jury selection plan so authorizes, upon a showing of undue hardship or extreme inconvenience..."

Subsection (c)(2): "excluded by the court on the ground that such person may be unable to render impartial jury service or that his service as a juror would be likely to disrupt the proceedings..."

*§ = "Paragraph"; bolded text my emphasis

Sources:

2 US Code 30a

28 US Code para 1866

Has it happened to a former president? Indeed Sort of. Can it happen to a sitting president? Technically, yes, but in reality its a long shot! Presidents, serving or otherwise, are not members of the legislative branch, but of the Executive branch. Naturally of course, a barrister conducting jury selection will have quite a feat on their hands trying to convince all involved that the POTUS or Ex-POTUS is both not greatly inconvenienced nor capable of gross bias in any instance.