Every vote counts. That's especially true for Montana Democrat Jon Tester, who faces the toughest Senate reelection race in the country this November—which may help explain why he privately met with a professional pole dancer earlier this month. Tester’s public schedule reveals a private meeting with Tiffany Rose and Jamie Goguen on Sept. 19, between two Senate floor sessions. Rose is a Montana resident and self-described "pole dance instructor" with tens of thousands of followers on social media. A spokeswoman for Tester did not respond to a request for comment. Such a meeting is peculiar for Tester, who represents a...