It doesn't surprise me that Mexico is doing more to address the border crisis than Democrats are. Mexico has an incentive to address these caravans, and Trump still has the ability to dialogue with Mexico and extract quid pro quo. The Dems' motivations are selfish and singularly unpatriotic. They want to use this crisis to their political advantage (and to be fair, so does Trump). Unfortunately, there appears to be no possibility of dialogue, forcing the administration to go it alone with no help from Congress to address a crisis that is crying out for a legislative solution.
And going it alone, with a political opposition rooting for failure, isn't easy. Just yesterday, a judge in San Francisco blocked Trump's action to house migrants temporarily on Mexico's side of the border while they await their asylum hearings. (Yes, Mexico IS trying to help!) The judge invited a legislative fix to permit the practice, but the Dems will never permit a good crisis to go to political waste. And so the misery will continue unabated, as the Dems sacrifice even the Dreamers in support of their agenda of hate and division.
