Donald Trump will set aside his bad-boy antics on Wednesday and, with the help of a teleprompter to keep him on message, outline what his foreign policies would be if he is elected U.S. president in November, campaign aides say.

Governments alarmed at the prospect of a Trump presidency will be paying close attention. Critics have accused the Republican front-runner of bigotry and posing a danger to U.S. national security.

Many foreign policy and defense advisers say his views are worrying, mingling isolationism and protectionism, with calls to force U.S. allies to pay more for their defense and proposals to impose punitive tariffs on some imported goods.