The problem is we have a common enemy and he is us. We are the Disunited States of America. How can we defeat an outside enemy when we are our biggest enemy?
The world is a much smaller place because of the internet . We have always been a nation that would argue amongst ourselves and in the end come out united and defeat the enemy abroad. This is no longer the case.
This attitude has been further fueled by big money from big donors creeping into politics. We no longer have a country ruled by one man, one vote. We have a country ruled by one dollar; one vote. He who has the most dollars gets to select our leaders.
It is not the President. It is Washington including Congress. It is also our state politicians. Every vote they take, every speech they give and every hand they shake is calculated based on how much money will it provide and will it help them live the good life they pursue. Most in Washington spend far more time thinking how to defeat their political opponent than they do about defeating ISIS.
Until we defeat this enemy at home it will become harder to defeat our enemies abroad.