A New Jersey congressman says he will demand a government inquiry into Mikhail Prokhorov, the Russian billionaire poised to buy the New Jersey Nets, for his extensive business dealings in Zimbabwe -- a bombshell that could blow up the $200 million team deal and threaten the future of Brooklyn's Atlantic Yards, The Post has learned. Democratic Rep. Bill Pascrell Jr., a member of the powerful Ways and Means Committee, wants to know if companies controlled by Prokhorov in Zimbabwe violate federal rules that forbid American citizens and companies, and subsidiaries set up in the United States, from doing business with...