Exclusive: U.S. weighs blacklisting dozens more oil tankers over Venezuela - officials

LONDON/NEW YORK/WASHINGTON (Reuters) - The United States is considering imposing sanctions on dozens of additional foreign oil tankers for trading with Venezuela, U.S. officials told Reuters on Friday, the latest effort to sever what Washington sees as a lifeline for President Nicolas Maduro.Some sanctions could be announced in the near term while others could be imposed over a longer period if the trading activity persists in violation of U.S. restrictions, one of the officials said on..