A conservative nonprofit has filed a federal lawsuit accusing the Hillary Clinton campaign of violating election laws when it paid British citizen Christopher Steele to gather Kremlin-provided political dirt on candidate Donald Trump. Though not stated outright, the lawsuit argues that Democrats violated an admonition issued last week by Federal Election Commission Chairman Ellen L. Weintraub. She decreed that political campaigns cannot accept “anything of value” from foreign nationals. The lawsuit from The Coolidge Reagan Foundation says the Clinton campaign and Democratic National Committee accepted something of a value from a foreign national, Mr. Steele, in the form of Kremlin...