BRIAN ELLSWORTH and SARAH KINOSIAN VENEZUELAN have started voting to choose a new congress that the opposition is boycotting and most Western nations call a fraud by President Nicolas Maduro to retake the last state institution, not in the hands of the ruling Socialist Party. The vote is almost certain to return congress to Maduro's allies despite his government struggling with an economy in ruins, aggressive U.S. sanctions that stifle the OPEC nation's oil exports, and the migration of some 5 million citizens. Members of the new congress will have few tools to improve the lives of Venezuelans whose monthly…