Sanders told "Fox News Sunday" that they "have to look at all options," including releasing undocumented immigrants to sanctuary cities, to deal with the situation at the nation's southern border with Mexico, Xinhua reported on Sunday.
"Whether or not it moves forward -- that's yet to be determined. This was raised at a staff level, initially, and pushed back on," she said.
"The President wants us to explore it again, and that's being done, and they are doing a complete and thorough review."
Trump threatened "placing illegal immigrants in sanctuary cities only" earlier this week, while blaming the country's immigration laws on Democrats.
"We hereby demand that they be taken care of at the highest level, especially by the State of California," he added.
The proposal has drawn sharp criticism from Democrats.
Sanctuary cities in the US are known as local jurisdictions that refrain from cooperating with federal authorities and detain undocumented immigrants for possible deportation.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)