[3] In early 2015, Wittich opposed the Medicaid expansion in Montana; as House Human Services Committee chair, he maneuvered in an attempt to block the legislation.
[12][13] Wittich's effort failed in April 2015, when 13 Republicans joined the entire 41-member Democratic caucus to support the expansion.
[15] In 2015, he introduced a "nullification" bill to instruct state and local police to ignore federal gun laws.
[17] The Montana Commissioner of Political Practices filed a civil lawsuit against Wittich for illegally accepting more than $19,000 in campaign contributions from a dark money group, the National Right to Work Committee and its affiliates, including the American Tradition Partnership, during his 2010 primary campaign for state Senate.
[5][9][18] In April 2016, after a five-day trial, a jury in Helena found that Wittich had violated campaign finance and reporting laws.
[18][19][20][21] In August 2017, the Montana Supreme Court unanimously upheld the jury verdict,[18] and Wittich paid a fine of $68,232.
[22] Wittich was a Montana delegate to the 2016 Republican National Convention, which nominated Donald Trump for president.