National numbers in latest FOX polls.
From February 17 to March 22, Trump is up 5 to 41 points. Kasich is up 9 to 17 points.
Cruz has doubled from 19 to 38 and 3 points behind Trump.
The RCP average has Trump at 43.0 and 12.7 points ahead of Cruz at 30.3 points.
The latest Wisconsin poll has Cruz one point over Trump, 36 to 35. Wisconsin picks their 42 delegates on April 5.