The answer is simple. Just bring down the demand for US Dollar which will weaken the USD. This will increase the purchasing capacity of non-US currencies. Thus make countries with weaker currency to prosper at the same time there will be lots of Foreign Direct Investment flowing back into America. This will make America Great Again, at the same time this will bring deflation in some Nations helping some of their poor Citizens to lead a good life on par with the Rich. I wish brain-drain from India stops completely with this and allow talented people to build India.
Every Nation must stop trading in USD for their imports/ exports. This will decrease the demand for the USD. Along with this, the US immigrants should not send money to their home country but keep it with them. This is how the Euro got stronger.
Last but not the least, I am not against America but I dislike some of the policies of the US Government. GOD bless All.