it is a coherent argument that a vacancy in an election year should be filled by the next president.
No it is not. Our Constitution grants Presidents four year terms with their full power for four years. Our Constitution does not envision some sort of President-minus status after three years.
The Senate has no obligation to confirm a Justice if they don’t want to. It’s part of the advice and consent they provide in accordance with the Constitution.
A Constitutional duty which the Senate did not perform. They did not “advise and consent.” The Senate did nothing. It was deplorable, more damaging to this nation than you insist obstructing Gorsuch would be.
I personally believe Gorsuch to be a superior candidate to the Supreme Court who should be confirmed. I believed the same of Garland. The resistance of some (but not quite all) Democrats to Gorsuch is no less petty than the Republicans refusal to even grant Garland a hearing.
The Republican obstruction to even consider Garland was the far greater threat to our country, and the viability of our judiciary, simply because it worked. The Democrats shall fail, partially because (unlike the Republicans) there are some among them principled enough to support Gorsuch.