The answer is
<span>Hostility towards the Soviet Union</span>
There are a number of checks.
The two most important are the House's ability, along with the Senate, to override the President's veto.
Additionally, the House has the power to draw up Articles of Impeachment if it is believed that the President has acted inappropriately.
Jesus did not build an army.
(Disclaimer: I am too lazy to find a part of the Bible in which it states this.)
