Oil rose from a four-and-a-half-year low after the US signaled tougher measures against Russia to spur a peace deal in Ukraine after declaring a blockade of Venezuelan oil exports. West Texas Intermediate futures climbed as much as as 2.7% to almost $57 a barrel on Wednesday. Most Read from Bloomberg Washington is considering options such as targeting Russia’s so-called shadow fleet of oil tankers and traders who facilitate such exports, in case Vladimir Putin rejects a proposed agreement with Ukraine ...