Then there's Congress. For the last two years, the congressional GOP has behaved as if we live in a parliamentary system, where the head of the party is also the head of government, and the legislators of the same party are obliged to follow the leader. But that's not how our system works. Congress is the first branch of government and is supposed to have a more adversarial relationship with the executive branch, regardless of party. You'd think Republicans, who claim to revere the Constitution, would know this.