The ideas of Montesquieu, used in the U. S. government, establish a system of checks and balances to: regulate trade.
establish political parties.
defend the country against foreign invasion.
prevent any one branch of the government from gaining too much power.

he made it to prevent a government branch from having too much power

To limit the power of any single group or person

Explanation:

explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.