A mother in a migrant caravan calls Trump: "Open the doors, please"

Every day that passes more migrants go to the Mexican side of the US-Mexico border. But for those who succeed, another difficult journey through the American asylum procedure, which requires them to prove that they have fled persecution at home, is waiting.

More than 75% of asylum applications from Central America have been denied from 2012 to 2017, according to Adriana Diaz of CBS News.

These chances do not dissuade a Nicaraguan family met by Diaz in Mexico. They hope to receive political asylum in the United States.

When asked why, Idenia Molina Rocha brandished a newspaper. She added that she shows her family on the front page, with a picture of their house. They support those who are against their president and they are persecuted for these beliefs.

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After using the problem of migrant caravans as an election campaign problem, Mr. Trump again focused on the subject. In a series of tweets on Friday, he questioned the motive of migrants who are considering seeking asylum in the United States, calling him a "BIG CON."

One woman told Diaz that she would not cross illegally, but that she would seek asylum at an official point of entry. She is part of a group of LGBT migrants who are among the first arrivals to the US-Mexico border. Many said they were persecuted in their country of origin because of their sexual orientation and gender identity.

Earlier in the trip to southern Mexico, Diaz met a transgender woman who claimed to have been targeted in Honduras by gang members and to have been attacked by more than a dozen armed men who broke into her home. She said that she had been beaten and that she had a scar following the attack, but that she did not like to show it because it traumatized her more. She fears for her life in Honduras because gang members know where she lives and have a picture of her.

Nevertheless, if she goes to the US border and presents her asylum case, the odds are against her.