By Luc Cohen NEW YORK (Reuters) – A U.S. judge on Tuesday ruled that prosecutors cannot show pictures of “lavish properties” owned by Tom Barrack, a former top fundraiser for Donald Trump, at Barrack’s upcoming trial on charges of acting as an illegal foreign agent. Barrack, a former private equity executive who prosecutors say acted as an agent of the United Arab Emirates, asked U.S. District Judge Brian Cogan last week to exclude evidence of his wealth, spending and lifestyle, arguing prosecutors were seeking to appeal to jurors’ “class bias” against wealthy people. In a written order, the B…