Tēvzemei un Brīvībai/LNNK
After the 2006 election, he was appointed the Minister for Justice, taking the office on 7 November 2006 and holding it until 12 March 2009. Bērziņš was elected to the 2010 election as one of two For Fatherland and Freedom/LNNK representatives on the joint National Alliance list that the party shared with All For Latvia!. When the National Alliance became a unitary party, Bērziņš became co-chair, along with Raivis Dzintars.