A political activist and former presidential candidate is calling on President Barack Obama to denounce an obscene suggestion made by former President Jimmy Carter's national security advisor.

Over the weekend, former President Jimmy Carter's national security advisor and vocal supporter of Barack Obama, Zbigniew Brzezinski, suggested that the U.S. should shoot down Israeli jets if they try to attack Iran.

Brzezinski was asked how aggressively Obama should insist that Israel not strike Iran's nuclear weapons facilities. He responded, "We are not exactly impotent little babies. They [the Israelis] have to fly over our airspace in Iraq. Are we just going to sit there and watch?" When pressed by the interviewer, he added, "Well, we have to be serious about denying them that right. If they fly over, you go up and confront them. They have the choice of turning back or not"...