A global warming crusader used a tax-exempt nonprofit to stuff his families’ pockets at the expense of taxpayers, according to a complaint filed with the Internal Revenue Service by two watchdog groups Tuesday. The Competitive Enterprise Institute and Cause of Action filed a complaint asking the IRS to revoke the exempt status of the Institute of Global Environment and Society Inc. — a global warming advocate that has received over $60 million in federal grants. The nonprofit’s founder and president is George Mason University Professor Jagadish Shukla, who was also the lead signatory of a Sept. 1 letter urging President...