President Donald Trump has pardoned ex-Nikola boss Trevor Milton, who was sentenced to four years in prison for deceptive practices.Milton and his wife donated over $1.8 million to one of Trump's campaign funds before the last elections.Prosecutors accused Nikola of engaging in deceptive practices, such as misleading videos and overselling the potential of its products.Milton expressed gratitude to President Trump for the pardon and called it a 'sacred pardon of innocence.'