Senate
(i think)
There is no approval presently required for Executive Orders issued by the President of the United States (nor has there ever been); current law is virtually silent in this regard.
Since the Constitution of the United States specifically designates that only Congress may make laws (Article I, Section 8, last sentence: "...To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.", many observers consider that Executive Orders are an unconstitutional, and therefore illegal, assertion of Presidential power over Congressional purview; nevertheless, depending on the criteria used in counting them, some 10,000 Executive Orders have been issued by the 44 American Presidents.
A comprehensive listing of all Executive Orders going back to President Franklin D. Roosevelt's four administrations (note that the very latest E.O.'s may not be reflected in the list for several weeks or even months after their signing) may be found at the Federal Register in the related link below.
It depends upon what actions we are talking about. If a President appoints someone to the Supreme Court, or signs a treaty, or declares war, that action must be approved by Congress. However, there are many executive orders that the President can issue on his (or hypothetically, her) own authority, without getting approval from anyone.
the senate
In the United States, the presidential nomination for the position of head of the CIA must be approved by the US Senate.
Presidential appointees
The Senate
The Senate must approve the President's appointments, and Congress can override a Presidential veto. Also, the Supreme Court can name a President's actions as unconstitutional.
legislative branch
senate
The United States Senate must approve all presidential appointments and treaties. The duties of the United States Senate is listed in the United States Constitution.
Congress must approve all appointments of ambassadors == ==
The Senate must approve treaties and presidential appointments.
Article II, Section 2, Clause 2 of the U.S. Constitution is referred to as the Appointment Clause. It gives the U.S. Senate the power to approve Presidential appointments.
The legislative branch has the power to disapprove and approve presidential appointments?
The Senate must approve the nomination by a simple majority (51%) of those voting,