Andrew Neil argues that a populist left in America is moving toward taking control of the Democratic Party, drawing a comparison to how populists on the right have influenced the Republican Party. In his commentary, he frames the situation as a natural political development rather than an isolated event, suggesting that populist movements tend to consolidate power within major parties over time. Neil’s column emphasizes the broader pattern of populist factions seeking to reshape party direction, messaging, and leadership, rather than operating only from the outside. He uses the phrase “on the march” to describe this perceived growth in influence. The piece also includes sharply critical language about the political environment surrounding leading figures (“First Family”), presenting his view as an explanation for why socialism is gaining attention and support in American politics. Overall, the sources present Neil’s opinion rather than reporting new, independently verified facts, and they rely on political analysis and analogy to characterize the alleged trajectory of the Democratic Party.