Migrants are trying to cross now instead of facing tighter policing.
The meeting between the foreign ministers of Canada, the U.S. and Mexico is held in Quebec City.
The U.S. is a nation of immigrants, he said.
"We can never say it often or loudly enough: Immigrants and refugees revitalize and renew America," Obama said.
Clinton called for an easier path to U.S. citizenship.
The lawyers noted that Univision was the leading media company serving Hispanic America when Trump made comments that outraged Mexican Americans, Mexican immigrants and Hispanics.
The agreement responds to the concerns on the safety of Cubans passing through Central-America.
Twelve survivors of the crash are from Mexico, according to a list released late Friday afternoon by Arkansas State Police.
"It is shameful for 'SNL' and NBC to think that racism can be repackaged as comedy," said Juan Escalante, digital campaigns manager for America's Voice.
The uproar began in June when Donald Trump, then co-owner with NBC, made anti-immigration remarks that offended Mexicans.