Donald Trump Jr. on Tuesday took a shot at CNN anchor Jim Acosta for seemingly using dye to darken his hair, but his mockery quickly came back to haunt him. Writing on Twitter, Trump Jr. posted an older photo of Acosta in which he had grayer hair and compared it to a photo still taken of Acosta on CNN this week which showed him with darker hair. “LOL looks like CNN Fake News loser Acosta got an embarrassingly bad hair dye job,” he commented, followed by three laughing emojis. Want more breaking political news? Click for the latest headlines at Raw Story. This prompted many commentators to warn…