In the Senate he is very focused on making sure that California gets every Dollar possible from Defense and Space spending, he supports the Civil Rights Act in 1964, opposes Prop 14 that would allow discrimination in housing (he opposed that IOTL), wins re-election easily in 1964, supports the Voting rights Act in 1965 (Goldwater also voted for the VRA IOTL).It was in his role of SAG President that Ronald Reagan came in contact with an actress named Nancy Davis, she was having trouble with being confused with another actress named Nancy Davis who was on the Blacklist.
Representative Reagan wins re-election in 1954 and 1956 and in 1958 runs for the Senate and wins the Democratic Party nomination against fellow Congressman Clair Engle and then beats Goodwin Knight handedly in the general election.
He is known as a "Scoop Jackson" Democrat strong on defense, anti-communist, and socially liberal.
Reagan supports Johnson on the Vietnam War and in 1968 he is the placeholder for Johnson in the California Primary and when Johnson drops he runs as a favorite son candidate in the primary and almost wins because RFK and McCarthy splits the Anti-War vote, it is only in a last minute switch that RFK prevails.
After RFK is killed Reagan as the second place vote getter gets all the California delegates and with support from the Southern delegates he forces Humphrey to go with a Pro-War plank in the platform.