Fox News host Tucker Carlson's long-running quest to blame the Biden administration for the war in Ukraine hasn't borne much fruit, despite his prominent perch on the most-watched cable news channel. We know very little about what happened to the pipelines, which carry natural gas from Russia to Europe, or who was responsible if the explosions were due to sabotage, which authorities say is likely. Anything seems possible at this point. But Carlson's supposed evidence for this being a U.S. operation is decidedly weak. Nonetheless, Carlson continued, that's where some people are pointing. "The Washington Post got right to it,"...