The difference between Democrats and Progressives

All progressives are Democrats,* but not all Democrats are progressives. In Congress the progressives belong to the Progressive Caucus (CPC) of which there are 74 members out of 253 Democrats in the House and Senate. It is a minority of representatives that actually represent the people instead of corporate interests. See the link for their agenda. Also see this recent interview of Adam Green, co-founder of the Progressive Change Campaign Committee. Therein you'll see the clear distinction between the progressives and the Democrats.

* Bernie Sanders, Senator from VT, is in the CPC and is an Independent and democratic socialist.