I can't disagree with one thing you just said. I see this as just the most recent sign that the political elite in this country see themselves as America's version of royalty which is why we should have iron clad term limits for EVERY elected office from small town mayor to president of the country. This needs to especially apply to US Senators and Congressmen. Two terms for Senators and four terms for Congressmen should be about right.
BTW, I don't think that every Democrat is a liberal or every liberal is a Democrat. The problem for many centrist Democrats is that the far left liberal fringe has a stranglehold on their party. These centrists dare not rock the boat for fear of never getting political contributions or hold any influence while in office. To equate the same thing happening to the Republicans it would be like Pat Buchanan and similar people completely controlling the Republican Party. Actually the Republicans have a different problem. They are controlled by the far left wing of their party too. Until this changes they will continue to be pushed to the margins. IMO, the country is begging for politicians that are strong on national defense, fiscally conservative, will reduce the tax load across the board (on individuals and businesses), promote a smaller less intrusive government and politicians that stop pushing their own personal morals and standards onto others (both the far left and far right do this very thing).