Selected, not elected.
When Kerry was running for President and Romney might be appointing the successor, the law was changed to put it to a vote. When Romney was out and Dead Red Ted Kennedy needed to be replaced, the Rats needed to make sure that there were 60 Democrats in the Senate and the law was changed to select-not-elect the replacement.
The Culture of Corruption continues.
And of course he’s black.
To the victor go the spoils and, one of the perks of being the majority party is that you get to change such procedural rules to fit your needs. Only a party of fools would take the alleged high road rather than use the power given by the people who elected them.
That's simple politics, and only one area where the GOPe is either clueless or incompetent.