Vatican protocol demands that those attending the papal funeral wear a black suit and a black tie. Trump was seen at the event wearing a blue suit and a blue tie. Biden, Zelenskyy also made protocol missteps.

President Donald Trump, who attended alongside the Slovenian-born first lady, donned a signature blue suit. Start the day smarter. Get all the news you need in your inbox each morning. The first lady's outfit harkens back to the dress and veil she wore to the Vatican during her husband's first trip abroad as president in 2017,