Complex sentence: The Coffee Party USA is an American political movement that was initially formed in January, 2010, as an alternative to the Tea Party movement, and has since grown into an increasingly diverse organization with members from across the political spectrum.
Split into simpler sentences: The Coffee Party USA is an American political movement that was initially formed in January, 2010, as an alternative to the Tea Party movement. While the group initially had significant appeal among those opposed to the Tea Party, it has since grown into an increasingly diverse organization with members from across the political spectrum.