It’s been over a year since Rep. Ron Paul (R-Texas) energized libertarians with his presidential candidacy, but the movement he inspired continues to ripple across the landscape. In at least a handful of House, Senate and gubernatorial contests across the country, former Paul supporters have emerged as credible contenders — or possible spoilers — ensuring that his message, once relegated to the fringes of Republican politics, continues to be heard. Paul began the 2008 presidential campaign as an afterthought but quickly won the attention of a previously dismissive GOP establishment and news media by generating intense grass-roots and online...