Rachel Maddow does a series of excellent pieces about why this attack on the unions is an attack on the Democratic Party. This attack is about the only institutions that financially help the Democratic Party.
"The two parties have combined against us to nullify our power by a ‘gentleman's agreement' of non-recognition, no matter how we vote ... May God write us down as asses if ever again we are found putting our trust in either the Republican or the Democratic Parties." -- W.E.B. DuBois (1922)