This isn't just about a TV ad - like the one he's still running quoting Obama as saying "This election should not be about the economy". He said that in 2008 but they edited out the beginning of Obama's sentence: "McCain said"
This week, Romney did it again, this time in person. He took a bunch of reporters to the former offices of Solyndra (without telling them where they were going in advance), then lied calmly that a special prosecutor conclusively linked the subsidizing of Solyndra by the Energy Department of the Obama administration to family and political contributors.
No special prosecutor did any such thing - in fact the investigation was inconclusive.
And spineless Romney stays quiet while Trump revives birtherism.
How the American people can even consider to vote for this coward and bald-faced liar is beyond me.