By the senate
The proper abbreviation for the word "confirmed" is "conf."
Congress
they are comfirmed by the senate
Presidential appointees
Confirmation
when approved by the Senate
It is the Legislative Branch that has the power to confirm the appointment of presidential appointments. They also have the power to declare war.
the US Senate
The appointment and confirmation process restricts presidential power. This is because these appointments aren't scheduled by the president. These appointments are scheduled by a different part of the government system, and this is the answer to your question.
Justices reach the Supreme Court through appointment by the President with Senate approval
To limit the presidents power