Trump is pushing Arab countries to line up against Iran, a shift that pressures both Iran and its neighbors.

• The usual story is Israel and the US versus Iran, but Iran's Arab neighbors are the ones now being forced to take a stand.
• Trump's move puts Oman, UAE, Bahrain, Kuwait, Saudi Arabia, Lebanon, and Syria on the spot to pick a side.
• The idea is that these countries have to deal with Iran's influence in their own region before anyone else can.
• The framing is that Iran's radical philosophy has taken over the neighborhood, and Trump wants that confronted directly.

Outlook: Expect more pressure on Arab states to publicly align for or against Iran in the months ahead.