What happens when you bring a Lamar Alexander to a Chuck Schumer fight? He turns around and becomes a weapon for Chuck Schumer and his allies, albeit an ineffective one. In 2007, before running for a second term, Alexander rightfully noted that “to regain the public’s confidence, we ought to scale it back and fix the problem step-by-step by absolutely securing our borders first, then enforcing our laws without amnesty.” Now, after years of voting for more spending, higher taxes, more debt, expanded government healthcare, massive energy regulations and subsidies, and liberal judicial nominees, the former third ranking Senate Republican...