It’s maybe too early to completely write off Jeb Bush’s struggling presidential campaign.

But it isn’t too early to declare that the $35 million – and counting – that Bush and his allies have spent in TV ads since September might go down as the least effective advertising campaign in presidential history.

Consider: Despite that more than $35 million, spent mostly by the pro-Bush Super PAC Right to Rise, Bush’s national poll numbers remain stuck in the single digits, with a recent national Monmouth poll showing him at just 3 percent.

What’s more, Bush and his allies have spent a whopping $17 million in New Hampshire alone, but Bush is just in single digits there.

And they’ve spent $9 million in Iowa, yet Bush’s favorable/unfavorable rating is upside down among GOP caucus-goers, according to the Des Moines Register/Bloomberg poll.