In 2015, when Michelle Obama visited Saudi Arabia, an Islamic country, and did not cover her head in the Islamic fashion, opinions were divided as to whether she did the right thing or not. Trump was against her and said as much in a Tweet.

"Many people are saying that it was wonderful that Mrs. Obama refused to wear a scarf in Saudi Arabia, but they were insulted. We have enuf enemies," he wrote.

Now, Melania Trump accompanied her husband, President Donald Trump, to the same Saudi Arabia 
and she did not cover her hair. Ivanka who was also in the country with her husband, Jared Kushner, went without a head covering too. 
Twitter users have now dug out the 2015 tweet Trump posted condemning Michelle's action and placed it side by side with a photo of Melania's uncovered hair. The internet never forgets!