That caravan of migrants from Central America has made it to America's doorstep . The migrants are in Tijuana, Mexico, right outside the San Ysidro port of entry in San Diego. About 50 of them were admitted to the immigration processing center on the Mexico side of the border, while dozens of others spent the night camping outside. Border patrol officials said the port is already full and migrants trying to get into the US may need to wait in Mexico as officials process those already in the facility. The migrants, who say they're fleeing violence and poverty in their home countries, want asylum. It's not illegal to enter the US at a port of entry and ask for asylum; international law requires the US consider asylum claims. President Trump, in tweets and at his rally in Michigan Saturday night, said that he would not accept the migrants into the country.