1. Why was the legislative branch given the most amount of power under the Constitution in relation to the two other branches?

2. What did the founding fathers try to prevent by doing this?

3. If the Legislature has the power to impeach a President, how does this check the power of the Executive?

Why was the legislative branch given the most amount of power under the Constitution in relation to the two other branches?

The Legislative Branch is the most powerful of all the branches of the government because it is the representative of the people and of the states, with that the Framers aimed to keep the power to the people. With that, the Framers gave Congress the power to set taxes, raise armies, declare war and suspend habeas corpus.

What did the founding fathers try to prevent by doing this?

The Framers did this because most of the power would be rested on the hands of the people and state representatives so they could prevent that power could not be wielded without balance. Since Congress will have to agree between two houses on every law and the President also checks the power with the veto.

If the Legislature has the power to impeach a President, how does this check the power of the Executive?

The House is the one responsible for bringing the impeachment charges against the President and the Senate has the power to impeach the President with 2/3 of its members. This is a part of the check and balances system because the Executive Branch has the power to veto laws that Congress has passed and the President can make foreign treaties. So the checks and balances system still works.