Tucker Carlson's interview with US Ambassador to Israel Mike Huckabee surfaced an alarming admission about Israeli territorial expansion, drawing scrutiny over US policy in the region.

• Huckabee, a Christian Zionist, told Carlson it would be "fine" if Israel claimed the biblical "Greater Israel" — Palestine, Lebanon, and parts of Jordan, Saudi Arabia, and Turkey.
• Such a project would mean mass displacement and killing of people across the Middle East.
• Carlson pressed Huckabee on what biblical or legal basis justifies modern Israel's territorial claims, and got no clear answer beyond scripture.
• The White House was reportedly annoyed Huckabee said the quiet part out loud, but Carlson said it was useful to know where the US ambassador actually stands.
• Critics focused on Carlson for asking the question rather than on Huckabee for endorsing expansion.

Outlook: Expect more friction inside US conservative circles over Christian Zionism and how far American officials will back Israeli territorial ambitions.