Upon reaching Mexico, the migrants must show a valid visa to enter the country, or face deportation, therefore Trump has focused much of his pressure on the Mexican government. On Thursday and Friday, the group clashed with police in the town and fought with them as Mexican man who was supporting the march was arrested. Metal barricades were stored to one side, but not yet deployed.
Hundreds of other members of the caravan who are lagging behind are expected to join the group that is gathered at the border.
"Mexico is in favor of legal, safe and orderly migration", he noted. What would he do, have our soldiers shoot the would-be immigrants if they don't stop walking forward? Others could opt for the rafts that ferry people - and historically migrants - daily across the river.
Irineo Mujica's organization, Pueblo sin Fronteras or People without Borders, said he was detained during a peaceful march.
Corzo said police accused Mujica of slashing the tires of an immigration vehicle. In a statement, Pompeo said he welcomed that plan. Guatemalan troops are also said to be putting up resistance.
But it's not clear what they will do - if they will physically prevent them from crossing the border or just monitor the situation.
His latest remarks come less than three weeks before the midterm elections and the Republicans are fighting to retain control of Congress.
Liverpool's Mane has operation on thumb injury
Sadio Mane , who reportedly broke his left thumb on global duty for Senegal, underwent surgery on Wednesday, Liverpool confirmed. Information from Reuters was used in this story .
"I must, in the strongest of terms, ask Mexico to stop this onslaught - and if unable to do so I will call up the U.S. Military and CLOSE OUR SOUTHERN BORDER!" he wrote.
"Republicans must make the horrendous, weak and outdated immigration laws, and the Border, a part of the Midterms!" he said.
However, although President-elect Andres Manuel Lopez Obrador has said he is confident that agreement with the USA can be reached, the Mexican government has denied that a deal has been done. "He's making a political calculation".
"I would like to highlight that for the Mexican government it is essential, in the first place, to respect and protect the human rights and the fundamental dignity of all of the migrants, and to do it under the logic of respectful, humanitarian treatment", said Foreign Minister Videgaray.
"Nobody likes them (Trump's comments)". And requests for asylum will be reviewed on a case-by-case basis, a process that can take up to four months. "And the step we took today, it's extremely important".
The "steadily growing caravan" is estimated at several thousand people and hope to reach Mexico within days. In press interviews, the immigrants are gaining widespread popularity for denouncing the inequality, corruption and state violence that plague all of Central America. One migrant said: 'One way or another, we will pass'.
The migrants say they organized for the long and hard journey on social media, but Washington suspects the group has been organized as a deliberate provocation.
"There are sectors that want to destabilize the country, but we will be decisive and we will not allow it, " Hernandez told reporters.