In May 2012, he returned to the Libertarian Party after failing to collect the 15,000 signatures necessary to be on the Republican primary ballot. Boman was nominated to be the United States Senate candidate of Libertarian Party of Michigan at their state convention in Livonia, MI on June 2, 2012. Boman beat out Libertarian activist and continuous party member Erwin Haas, who had built a campaign based around fighting "Party Jumping" and the possibility of the Libertarian Party becoming a dumping ground for Republicans unable to get on the ballot.