I think a better explanation is donations. Republicans and Democrats both get the majority of their money from the same set of donors. So, that means they often agree on finances.

I'm not saying he is wrong, I'm saying that he is right but for different reasons than he is saying.

And spending and war are basically the same issues. Dropping bombs is expensive and generate hella money.

I believe the true unifying issue is money out of politics. www.wolf-pac.org or any other organization that is trying to get money out of politics is worth a look.