Hint: Look at who has which powers. Congress has the power to check every other branch. Neither the President nor the courts have symmetrical power over Congress. This asymmetry reflects its position.

I must admit I am a bit flabbergasted. How can you not understand what you read? And if a portion of Hacker News users, who are likely to have above average cognitive ability, don’t understand this, how poorly does the rest of the population understand the core ideas of how their political system works?