Not sure if anyone is good at posting graphics (I’m not), but the HuffPost poll tracker does a good job of showing how Cruz has peaked and is on a decided downswing.
http://elections.huffingtonpost.com/pollster/2016-iowa-presidential-republican-caucus
Regardless of what his supporters say, Cruz really hurt himself during the last debate. Both Trump and Rubio ate his lunch. Then campaigning with Glenn Beck. What was he thinking? He, who accused Carson and Trump of lacking good judgment. He isn’t dry behind the ears yet and not ready for prime time.