President Donald Trump presented Canada with an online offer to join his multi-billion Golden Dome missile defense system for free – on the condition that it ceases being a country and joins the U.S.

Trump spelled out the stark terms in a Truth Social post where he once again resumed his pressure for Canada to become the 51st U.S. state.

'I told Canada, which very much wants to be part of our fabulous Golden Dome System, that it will cost $61 Billion Dollars if they remain a separate, but unequal, Nation, but will cost ZERO DOLLARS if they become our cherished 51st State. They are considering the offer!' Trump posted.

It came days after Trump gushed about the new missile defense system for the entire country and continent that he said would work with near '100 percent' accuracy.

'We're going to have it at the highest level,' Trump said. 'Canada has called us and they want to be a part of it,' Trump added. But his language indicated continued disgruntlement, saying 'as usual, we help Canada as best we can.'