Organizing for Action — a group that formed out of President Obama's re-election campaign — has focused its ire on Republicans it calls "climate change deniers." But some environmentalists are frustrated with the president himself on issues like the Keystone pipeline.

The IRS bureaucrat showed up long enough at a House hearing into the scandal engulfing her agency to declare her innocence and her constitutional right to say no more.

Amid warnings the proposal would shatter support for the measure, Democrats backed away from a provision that would allow gay U.S. citizens to sponsor foreign-born spouses for green cards. Advocates for gay and lesbian immigration rights accused Democrats of caving in to threats.

Lois Lerner was the first IRS official to explain how conservative groups' applications for tax-exempt status were flagged for extra scrutiny. On Wednesday, she cited her constitutional right not to incriminate herself and declined to answer questions from a House committee.