Matías Vicente Walker Prieto (born 19 July 1973) is a Chilean politician who currently serves as a member of the Senate of Chile.

[1] Similarly, he served as a member of the Chamber of Deputies of Chile.

[2][3] On 27 October 2022, Walker resigned from the Christian Democratic Party after being a member for nearly 30 years.

[4] This stemmed from Walker's decision to support the Reject option in the 2022 Chilean national plebiscite, contrary to his party which decided to support the Approve option.

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