He was Reagan's second choice to fill the seat; Reagan's first nominee, Deputy U.S. Solicitor General Andrew L. Frey, was withdrawn due to opposition from conservatives who expressed concern about Frey's stance on gun control and abortion.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: He was Reagan's second choice to fill the seat; Reagan's first nominee, Deputy U.S. Solicitor General Andrew L. Frey, was withdrawn due to opposition from conservatives who expressed concern about Frey's stance on gun control and abortion. ### Response: .