Baldwin ran as the Democratic nominee against Republican nominee Tommy Thompson , who had formerly been governor and Secretary of Health and Human Services . She announced her candidacy on September 6 , 2011 , in a video emailed to supporters . She ran uncontested in the primary election , and spoke at the 2012 Democratic National Convention about tax policy , campaign finance reform , and equality in the United States
2012 Democratic National Convention
2012 Democratic National Convention
Tammy Baldwin