If being great means using your power to serve your interests than, perhaps.
What lasting impression did he have on politics?
He helped make it commonplace to stir up tensions in third world countries and supply them with antiquated weapons to kill each other so that he could use the violence as a pretext to declare war or justify a military presence.
He helped to abridge civil rights and freedom to organize and protest.
He contributed to deregulation in the financial sector
He increased our countries debt
reallocated funds for education and infrastructure to national security
enhanced CIA autonomy
This great man had a vision, unfortunately it was the same as all his predecessors