by criminals and unknown middle east everyoners, a claim he made again tonight without offering a shred of evidence. >> as the caravan -- and, look, that is an assault on our country. that's an assault. and in that caravan, you have some very bad people. you have some very bad people. and we can't let that happen to our country. >> so i said it when this all started, and i've been saying it, and i'll say it again. it's a message that is tailor-made for his base. time for maximum impact and amplified by fox news. fox business host lou dobbs, he's calling the migrant care vein a full-blown national security crisis. and on "fox & friends" this morning, the show the president regularly watches, one host saying this. >> you've got the president of guatemala saying to a local newspaper down there just last week, they caught over 100 isis fighters in guatemala, trying