Rick Perlstein is the author, most recently, of Nixonland: The Rise of a President and the Fracturing of America.

President Obama lowered taxes. Why doesn't the country know that? Rick Perlstein on how Rush Limbaugh helped mislead a nation—and why the Democrats let him get away with it.

The last year has taught a hard lesson about the power of a determined minority to keep the majority in check. Forty senators representing about 9 percent of Americans can filibuster Obama’s initiatives—and the media declares him a failure.