You don't make hundreds of millions of dollars buying and selling companies without being a slick salesman. Saying whatever you have to say to make "the sale". Fact-checkers be damned. The salesman doesn't care after he has your money... (Or vote.)
Google can now combine what they learn about you from across their different products. Never slow to early-adopt when it comes to technology, the Obama campaign is endeavoring to do the same thing in the political space.