WASHINGTON – Rick Perry, after calling Mitt Romney a “fat cat,” today also called on the former Massachusetts governor to release his income tax returns, an indication that Perry will increasingly make an issue of Romney’s wealth in the Republican presidential primary. The strong charges from Perry are striking coming from a candidate who himself two months ago accused President Obama of “trying to engage in class warfare and shooting high-powered bullets at people who have corporate jets.” Now, as Perry tries to gain an edge on Romney – by far the wealthiest candidate in the race – the Texas...