Every year Mexicans working in the US send around 20 BILLION dollars back home.
The funds help individuals and boost the economy.
But Donald Trump's plans to build a wall the length of the US-Mexico border has officials worried.
If the presumptive Republican presidential nominee makes it to the White House he says he'll make Mexico PAY for the wall, even if this means impounding remittance payments.
For more on the consequences of this, Take Two's Josie Huang is joined by Raul Hinojosa-Ojeda.
He's an associate professor in the César E. Chávez Department of Chicana and Chicano Studies at UCLA and an expert on immigration.