This cycle, they are not even pretending to care about anything but power. Their agenda is simple: if Trump supports it, they oppose it. If he opposes it, they support it.
Depending on who you believe, there may or may not be a caravan of people wanting to walk into our country and presumably either go on welfare, or take jobs currently held by someone else. If they do exist, Democrats support them, because Trump opposes them.
Given that Trump is trying to help Americans, and manifestly succeeding in many ways, this attitude is childish, self absorbed and rude.
But you can vote for it, nonetheless.