CIUDAD HIDALGO, Mexico (AP) — About 2,000 Central American migrants who circumvented Mexican police at a border bridge and swam, forded and floated across the river from Guatemala decided on Saturday to re-form their mass caravan and continue their trek northward toward the United States.

Gathered at a park in the border city of Ciudad Hidalgo, the migrants voted by a show of hands and then marched to the bridge to urge those still there to cross the river and join them.

"Let's all walk together!" and "Yes we can!" they cried, defying warnings to turn back this week from U.S. President Donald...