The family was detained in Thailand in 2014 after fleeing increasing repression in their hometown in China's Xinjiang province. She and the children were allowed to leave Thailand a year later. But her husband remained in detention, along with 47 other Uyghur men. Niluper – not her real name – now fears she and her children may never see him again.

Dozens of men from the ethnic minority sought escape from repression in China a decade ago, but have been detained in Thailand ever since.

A group of Uyghurs who were detained in Thailand over a decade ago say that the Thai government is preparing to deport them to China, alarming activists who say the men are at risk of abuse and torture if they are sent back.

"Thailand is a very strong U.S. partner, a strong historical ally," Rubio said during his Senate confirmation hearing Wednesday. "That is an area where I think diplomacy could really achieve results because of how important that relationship is and how close it is.