In 1962 , he ran for the United States Senate seat vacated by the retiring Republican senator John Marshall Butler , and defeated Congressman Edward Tylor Miller to become the first Democrat elected to the Senate from Maryland since 1946 . He served in the Senate from 1963 to 1969 . He was defeated in the 1968 election by Charles Mathias , Jr . In 1964 , he ran in the Democratic presidential primaries against segregationist George Wallace . As Lyndon Johnson refused to run nationally , " favorite sons " were run in his place against Wallace , such as Matthew E. Welsh of Indiana and John W. Reynolds of Wisconsin . Brewster won his state 's primary but was embarrassed by Wallace 's showing of 43 percent . As is required , Maryland delegates to the 1964 Democratic National Convention voted for Brewster on the first ballot , then voted for Lyndon Johnson
1964 Democratic National Convention
1964 Democratic National Convention
Daniel Brewster