Former President Donald Trump is now taking off the gloves in his latest missive against top rival Nikki Haley as the Iowa Republican Caucuses approach. In a lengthy statement from Trump campaign spokesman Steven Cheung, the 45th president of the United States referred to his former UN ambassador as a “sellout to lobbyist parasites” with a “total disdain for the working-class.” Trump even gave her one of his patented nicknames: “Nikki New Taxes.” “She pushed for a WHOPPING 60% increase in the state gas tax in South Carolina after promising voters she would never do so,” the statement read. “Sh…