Complex sentence: By early 1944 the Democratic Party, which was a combination of the Commonwealth Party and the remnants of the UAP was the main conservative party in New South Wales under the leadership of Reginald Weaver and with the support of most of the former UAP members of parliament.
Split into simpler sentences: By early 1944 the Democratic Party, which was a combination of the Commonwealth Party and the remnants of the UAP had emerged as the main conservative party in New South Wales. It was led by Reginald Weaver and had the support of most of the former UAP members of parliament.