[pessimizer]

Both the Republicans and the Democrats paint each other as insufficiently committed to attacking Russia and China. It's because they both, wisely, don't respect the intelligence of the people who vote for them.

edit: not that both don't have a huge base that is against WWIII, but with the Republicans, having a far more democratic internal process that was a concession to Tea Party activists, some of that base actually gets to have a say in Congress. The Congressional Democratic Party is completely impenetrable to anyone in their base who isn't an extreme nationalist hawk, whereas Republicans can't realistically exclude isolationists/paleocons.