that doesn't count as persecution, studies show 88% to claim asylum ultimately get their date in immigration court. >> let's make sure if they do come to the u.s. border, they are able to go through the full and fair process of seeking asylum and that's what they desire. >> because of backlogs in the courts, shelter space and judicial rulings, immigrants can't be held indefinitely. that concerns president trump, who blames ridiculous liberal democrat laws like catch and release for the problem. sunday he asked mexico to stop the caravan. >> mexico has got to help us at the border. they flow right through mexico, they come into the united states. it can't happen that way anymore. >> mexico did deport some 70,000 central americans last year, although historically, they've been allowed to pass through, though it is against mexican law. the group is likely to reach the u.s. in the next ten days unless the trump administration can pressure mexico to stop them first otherwise there will be process like everyone else