Even in a blue state, and amid signs that liberal Democratic enthusiasm is surging nationwide, Jay Gonzalez likely faces a steep climb in his bid to unseat Massachusetts' popular Republican governor in November. Gonzalez handily won the Democratic nomination, but now must quickly figure out a way to channel into his campaign the energy and thirst for change that powered Boston City Councilor Ayanna Pressley's primary election upset of longtime Democratic U.S. Rep. Michael Capuano.