Where does the Constitution elaborate this "right" for the President's nominee to fairly evaluated by the Senate? How is a potential Senate delay on confirmation hearings an "insult"? Perhaps you should read more about the Executive branch and what exactly the head of that branch has sworn to do (prosecution of the law vs enforcement the law) and reconsider said insults.
Please elaborate how a Democrat-controlled Congress could lose it's majority if the electorate is happy/pleased with their performance as a Party?
Article 2, Section 2 of the Constitution
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.
In the bold above, the right to nominate and Congress may vest the nomination if they choose. Essentially, and I take this from the wording, the President could appoint a judge and Congress would only shoot it down if they disagreed which means that they must evaluate the candidate. I say fairly because frankly, decisions made purely with respect to factionalism rather than critical analysis are ruining this country. The Founding Fathers warned of the this, and I consider it an insult not only to the Constitution but also to the people for elected officials to act or vote a certain way because a party tells them to though I guess that would depend on if voters vote by party rather than candidate, but that is a different discussion.
Lack of voting participation or change thereof for the following election because (insert reason here) or gerrymandering are the main two. I know of many of my parents friends that only vote in Presidential elections and only recently decided to vote in Congressional elections because they hate Obama and don't want a Democrat Congress to just go with whatever he says. Terrible example but it is sadly true.