The Australian Labor Party (Anti-Communist) (ALP-AC) was the name initially used by the right-wing group which arose from the 1955 Labor split. In 1957 it changed its name to the Democratic Labor Party, and was dissolved in 1978.
As part of the ALP split of 1955, in April 1955, 7 Victorian federal MPs and 18 state MPs were expelled from the ALP. The federal MPs were: Tom Andrews, Bill Bourke, Bill Bryson, Jack Cremean, Bob Joshua, Stan Keon and Jack Mullens.
On the night of 19 April 1955, Henry Bolte raised a motion of no-confidence against Cain's government in the Legislative Assembly. After twelve hours of debate on the motion, in the early hours of 20 April, 11 of the expelled Labor members crossed the floor to support Bolte's motion. With his government defeated, Cain sought and received a dissolution of parliament later that day, with the election set down for 28 May..
The expelled ALP members formed the Australian Labor Party (Anti-Communist) under the influence of B. A. Santamaria.
At the 1955 Victorian election held in May, 11 of the 12 expelled MPs in the Victorian Legislative Assembly, as well as other candidates, and the one MP facing re-election in the Victorian Legislative Council lost their seats. The party drew 12.6% of the vote, mainly from the ALP, but because its vote was widely spread only one of its candidates, the expelled Labor member Frank Scully, was re-elected. The party directed its 12.6% vote to the Coalition, and most of its supporters followed the party's preferences. Labor won 37.6% of the vote and 20 seats to the Liberals' 34 and the Country Party's ten. In any event, the Cain Labor Government lost government at the 1955 election. Five MPs whose terms had not expired remained in the Legislative Council until the expiry of their terms at the 1958 Victorian election, and all who recontested their seats were defeated.