The decision dismayed some Somali officials, who appealed to President-elect Joe Biden to reverse the decision.
The proposed legislation would allow a girl to be married once her sexual organs mature.
Most of those killed were students returning to class.
"She might come back and appreciate America more," the Republican senator said.
Somali forces ended an all-night siege on a hotel in the southern port city of Kismayo on Saturday morning.
Halima Aden knows immigrants can be "misunderstood" and is speaking out to make a change.
From Afghanistan to Somalia, Special Ops achieves less with more.
The current administration halted the program that allows spouses and children of refugees to find safety in the U.S.