Republicans have spent weeks hammering President Joe Biden as too slow in responding to Russia’s brutal invasion of Ukraine. Enter Rand Paul. The idiosyncratic GOP senator is undermining his own party’s message by single-handedly delaying a revocation of normal trade relations with Russia, thereby slowing efforts to further incapacitate Russia’s economy. Paul is refusing to allow a quick vote on the bill absent a deal to narrow presidential power to enact sanctions — an ask that leaders in both parties have spurned. And as he’s done many times, Paul is not budging under growing bipartisan pressure. “Somebody ought to read...