I won't go into Europe but various Arab countries have long made it a policy to be dependent on the U.S. as a contingency against threats from fellow Arab countries and from internal threats. There is also the question of how keen the U.S. really is for countries to be less,dependent on it.
The point I was trying to.make is that the U.S, even before this ''pivot'' to the Asia Pacific, has long overstretched itself. It has written out numerous cheques and if several cheques are cashed out, it would be somewhat problematic.
Take the Asia Pacific, the U.S. has treaties with Japan, South Korea, the Philippines, Thailand and Australia. It's also committed to come to Taiwan's defence.