Following that logic we should remember that Nancy Pelosi is not the equal of POTUS (the unitary executive). POTUS IS THE EXECUTIVE BRANCH.
https://en.m.wikipedia.org/wiki/Unitary_executive_theory
The unitary executive theory is a theory of American constitutional law holding that the President possesses the power to control the entire executive branch. The doctrine is rooted in Article Two of the United States Constitution, which vests "the executive power" of the United States in the President.
We do have checks and balances. Pelosi is the majority leader of ONE-HALF of the Legislative branch.
Many forget that the Senate can be a check and balance against a runaway House just as the House can be the check and balance against a runaway Senate.