Hitler introduced many policies and measures to ensure the Nazis remained in control, once he declared himself Führer. These measures dealt with political opponents, as well as ordinary people, who suddenly found their private, social and working lives controlled by the Nazis.
When President Truman took a hard line against striking workers in the years immediately following World War II, he:
"had little understanding of the plight of laborers in the post-war years."
During the first months of his administration, he became involved in a struggle between coal miners and railroad workers. It took several meetings, and fierce arguments, to get them to agree, and end the strike.
The Bill of Rights is apart of the constitution, whereas the democratic party and political parties are not mentioned in the constitution. I would go with political parties since they were developed during the same time as the constitution and is broader than just democrats (the democratic party was founded in the early 1820s.)