Cruz getting a boost from those wanting to confront Obama's bad policies
...He has been moving up in the polls since his announcement. I think the rout of the Democrats in 2014 was based on the feeling of many, that Republicans were needed to fight Obama's policies and the evils of liberalism.
... More than anything, Cruz's popularity among conservatives is rooted in the feeling that he's the only one willing to take the fight to Obama. To the extent that conservative voters feel disillusioned with Republican leaders who they see as largely ineffective, Cruz will stand to gain by promising to fight liberals tooth and nail. The more frustrated conservatives become with Congressional Republicans, the more they'll find Cruz's brand of confrontational conservatism appealing.