Not a peep out of Romney or the GOP. That right there makes it all the more obvious the last two elections were nothing but set ups and frauds from at least back to 2006. Something came into play during W’s second term when he was playing a great imitation of the body snatchers.
You do have a point about McCain going through the motions in 2008 and even suspending his campaign for several days because of the Wall Street banks failing. It was obvious that McCain didn't want to get into the sordid details of Zero's background for fear of being counterattacked with the "R" word.
Romney's campaign, though it made some mistakes (notably the failure to bring up Benghazi), was significantly more aggressive compared to McCain's and he clearly did better in debating Zero.
Don't know why Romney didn't say anything himself about the blatant fraud and cheating by the opposition in the election. Maybe it would have been counter to his "Mr. Nice Guy" character or his religious principles, or thought it would have soiled his personal reputation to have gotten down into a mud wrestling match with the sleazy enemy on the election fraud issue.