A Dubai-based company abandoned its effort to take over some operations at six major U.S. seaports, including the Port of Miami-Dade, after Congress made clear it would block the deal. WASHINGTON - With President Bush unable to contain a Republican congressional rebellion, a company owned by the United Arab Emirates vowed Thursday to turn over its just-acquired operations at six major U.S. port terminals, including the Port of Miami-Dade, to an American entity. One possible buyer: Fort Lauderdale-based Eller & Co., which has had a longtime role in operating the Port of Miami-Dade. The surprise move came after congressional leaders...