The constitution introduces the phrase "by and with the advice and consent of the Senate" and clarifies that "consent" means "provided 2/3 of the Senators present concur".
It then uses this phrase again, without repeating (or modifying) the clarification, and both times the intention is to tightly constrain the President's actions, so as to be "with the consent of the Senate". Such usage is a very common "device", with the short phrase now appearing in the clarification's stead, not needing to repeat the entirety of it.
Consequently, the President has the power to: nominate Ambassadors, other public Ministers and Consuls, Judges of the Supreme Court, and all other Officers of the United States but can only make treaties and turn nominations into appointments [with the advice and consent of the Senate], which means he can only make treaties and turn nominations into appointments [provided 2/3 of the Senators present concur].
How is it possible that a given party seems unable to block any such appointments?
Wasn't this precisely the intent? To ensure that these specifically enumerated positions would compel the nomination of people who would pass this higher bar as properly non-partison selections, to increase the likelihood of appointing excellence?
If not, why call these things out at all? Requiring only a simple majority invites a tyranny thereof, invites factional politics, invites an unconstrained President, the very things the framers were so determined to prevent.
Were they truly this inept?
Or is it we who are failing--we who cannot think, and read, and understand?
For reference-- USCS Const. Art. II, § 2, Cl 2. reads as:
“He shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two thirds of the Senators present concur; and he shall nominate, and by and with the Advice and Consent of the Senate, shall appoint Ambassadors, other public Ministers and Consuls, Judges of the supreme Court, and all other Officers of the United States, whose Appointments are not herein otherwise provided for, and which shall be established by Law: but the Congress may by Law vest the Appointment of such inferior Officers, as they think proper, in the President alone, in the Courts of Law, or in the Heads of Departments”.