the scary part is falling into that who s electable, which way do i go? who do i think can get elected and who do i really support? woodruff: plus, stuart rothenberg and susan page assess the state of play in the g.o.p. campaign as the candidates vow they are in the race for the long haul. ifill: as russian presidential elections approach, antigovernment protests grow. ray suarez talks with margaret warner, who s reporting from moscow. woodruff: and spencer michels reports on how music therapy can help the brain recover from disability or injury. music can make a positive impact on people suffering from early onset dimension, kids with aus tism, with veterans coming back and trying to learn to walk without a limb. ifill: that s all ahead on tonight s newshour. major funding for the pbs newshour has been provided by: bnsf railway. the william and flora hewlett foundation, working to solve social and environmental problems at home and around the world. and wit