What hath Rand Paul wrought?

Paul has recognized, as a figure like Huntsman did not, that to infuse new ideas into a moribund party you need to speak the language of the base, and sell conservatives as well as moderates on your proposed course correction. (There’s a reason his recent foreign policy speech was delivered at the Heritage Foundation — normally a redoubt of Cheneyism — and his two big interviews after his filibuster were with Glenn Beck and Rush Limbaugh.) And he’s exploited partisan incentives to bring his fellow Republicans around to his ideas, deliberately picking battles — from the Libya intervention to drone warfare — where a more restrained foreign policy vision doubles as a critique of the Obama White House.

Those incentives, rather than an intellectual sea change on the right, explain why his filibuster enjoyed so much Republican support. (Most of the senators who gave him an assist were just looking for a chance to score points against a Democratic White House.) But if Paul hasn’t won the party over to his ideas, he’s clearly widened the space for intra-Republican debate. And if he runs for president in 2016, that debate will become more interesting than it’s been for many, many years…

Rather, the lesson of Paul’s ascent is that being a policy entrepreneur carries rewards as well as risks — and that if you know how to speak the language of the party’s base, it’s possible to be a different kind of Republican without forfeiting your conservative bona fides.