Billionaire Koch brothers file a lawsuit against Cato, Ed Crane and a board member for control of the think tank. (Washington Post)

Cato’s Ed Crane responds to the Koch lawsuit, calling it a “hostile takeover” of Cato. Noteworthy is that Crane singles out Charles Koch, despite both brothers named as plaintiffs in the court documents. (Washington Post)

Obama’s oil switch: “This early decision established a trend for the Obama administration, which continues today. In February, the administration rescinded plans drawn up during the Bush years to open land in Colorado, Wyoming, and Utah for shale-gas exploration. This area includes the Great River Formation, reported by the Rand Corporation to hold between 1.5 and 1.8 trillion barrels of crude oil. Overall, the American Petroleum Institute claims that leases on federal lands are down 44 percent from 2007.” (National Review)

Aaron David Miller points out that it’s no longer Egypt, Syria and Iraq driving the Middle East. Now it’s Iran, Turkey and Israel. (LA Times)

Putin absolutely must in the first round in Sunday’s presidential elections: “Major polls show that their efforts, combined with Putin’s own energetic campaigning, have indeed helped boost his rating. But an opposite trend is also at work: the disingenuousness of his campaign deepens anti-Putin sentiments that have already inspired tens of thousands here to take to the streets,” writes Carnegie’s Masha Lipman. (Washington Post)

Politico’s Arena asks: Should Rush Limbaugh apologize for calling the Georgetown University law student a “slut” after she testified on Capitol Hill about women’s access to contraception? Brookings’ Darrell West answers.

Carnegie’s Deborah Gordon says the real climate debate is over unconventional oils. (Politico)

Following Rick Santorum’s assertion that President Obama is a “snob” for wanting to make college available for all, Room for Debate asks: Should college be for everyone? (New York Times)