The president shall have power to fill up all vacancies that may happen during the recess of the senate, by granting commissions which shall at the end of their next session. which principle is illustrated by this excerpt from the constitution? a. republicanism b. checks and balances c. popular sovereignty d. rule of law

This would be an example of checks and balances.

The President can fill vacancies that occur but that power is not limitless. Congress, specifically the US Senate, has the power to advise and consent. So, the President cannot circumvent the Senate's advise and consent power with recess appointments.

This allows the country to have valuable staff, even during vacancies, but still requires the Senate's approval.