Charles Krauthammer said on "Special Report with Bret Baier" Thursday that the resignation of Yemen's president and leadership is a "huge geopolitical gain for Iran."

"What comes after, for us, is bad news," the syndicated columnist and Fox News contributor said. "This is a country that Obama touted as a great success. It all hinged on the government, now destroyed and deposed."

Krauthammer added that the Iranian influence now spreads throughout the region from Iraq to Syria and now Yemen, "That's why this is a double attack on us," he said. "It's a loss of an ally against Al Qaeda. and it's a huge geopolitical gain for Iran extending its influence over Arab states."