Prior to recent Supreme Court decisions many regulatory agencies and things like the Justice Department were independent agencies that could provide some check on executive branch abuses. But that is gone now.
Congress can perform investigations, but without the President's signature they cannot take actions that have the force of law. Impeachment cannot remove any official from office without 2/3 support in the Senate. Congress CAN refuse to fund some activities, but the administration has been ignoring existing legal restrictions on spending.
So no, Congress won't take any meaningful action to reign things in for at least two years, regardless of who wins the election unless we also overthrow the government in some way.
Congress can perform investigations, but without the President's signature they cannot take actions that have the force of law. Impeachment cannot remove any official from office without 2/3 support in the Senate. Congress CAN refuse to fund some activities, but the administration has been ignoring existing legal restrictions on spending.
So no, Congress won't take any meaningful action to reign things in for at least two years, regardless of who wins the election unless we also overthrow the government in some way.