“Forty-seven senators, all of them Republicans, have sent a letter to Tehran that might be summarized this way: Dear Iran, Please don't agree to halt your nuclear-weapons program, because we don't like Barack Obama and, anyway, he'll be gone soon. That may be shorthand, but it is not an exaggeration of either the tone or the intent of the letter, which was signed by the Majority Leader, Mitch McConnell, as well as John McCain, Marco Rubio, Ted Cruz, and Rand Paul. The signature drive was organized by Senator Tom Cotton. He is a thirty-seven-year-old Republican, who entered the Senate two months ago, from the state of Arkansas. ...

”As with the invitation that John Boehner, the Speaker of the House, extended to Benjamin Netanyahu, the Prime Minister of Israel, to speak before Congress, it is not clear whether the primary impetus has to do with foreign policy or with partisan theatrics. Is the intention to scuttle the nuclear negotiations, without regard for the ugliness that it brings to our politics? Or is it to humiliate and insult President Obama, no matter the cost to the goal of nuclear nonproliferation—even if it means another bomb in the world?“

-- Amy Davidson, ”Congress's Poison-Pen Letter to Iran," on The New Yorker site.