John Catsimatidis, a Greek immigrant and the founder of New York City grocery chain Gristedes, is a vocal supporter of President Trump. On the topic of Trump's reelection campaign, Catsimatidis told Bloomberg's Hailey Waller, "I don't want a job. I'm here to help." Catsimatidis has a net worth of $3.1 billion, Forbes estimates. Visit Business Insider's homepage for more stories. John Catsimatidis built a fortune operating a New York City-area grocery chain after his parents brought him to the United States from Greece as a baby. That hasn't stopped him from becoming an immigration hard-liner.