Chip Somodevilla/Getty Images(NEW YORK) — Eric Trump wanted to leave no doubt that he had voted for his father, Republican presidential nominee Donald Trump.

So earlier this morning, Donald Trump’s son tweeted a picture of his ballot, filled out with a vote for his father.

Along with the picture, Trump tweeted, “It is an incredible honor to vote for my father! He will do such a great job for the U.S.A! #MakeAmericaGreatAgain.”

The only problem: It is illegal in the state of New York, where Eric Trump voted, to post a picture of a completed ballot.

Trump was called out on Twitter by voter watchdog group Electionland, a collaboration of ProPublica and newsrooms across the country.

“A quick reminder to other New York voters: This is actually illegal. Please do not post a picture of your ballot (or a ballot selfie),” Electionland tweeted, with a link to Eric Trump’s tweet.

Eric Trump eventually deleted the tweet. But not before Electionland’s tweet was retweeted more than 900 times, the group reported.

In New York state, a picture of a completed ballot or showing how someone voted is a misdemeanor and punishable by a $1,000 fine.

Although 17 other states have similar laws prohibiting ballot selfies, the laws are rarely enforced. Justin Timberlake faced a similar issue while voting early in Tennessee this year, but the district attorney there said the matter would not be investigated.

Last week, a federal judge in New York rejected a request from voters in Manhattan and Brooklyn to temporarily suspend the law to allow ballot selfies in the state. The judge said “a last-minute, judicially-imposed change in the protocol at 5,300 polling places would be a recipe for delays and a disorderly election.”

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