Conservatives warned the White House on Wednesday against striking a deal with California’s two Democratic senators to water down President Trump’s judicial picks for the West Coast’s federal appeals court. Sen. David Perdue, a Georgia Republican close to Mr. Trump, said he will call and try to scuttle the negotiations, reported by The Wall Street Journal, that would have the White House pick one conservative, one consensus nominee and one liberal nominee for three openings on the already liberal U.S. 9th Circuit Court of Appeals. “Why do we need to do a deal? This is totally within our purview. We...