He was a moderate in the Manitoba Progressive Conservative Party, and supported the centre-right Progressive Conservative Party of Canada rather than the right-wing Canadian Alliance at the federal level, even though many of his colleagues backed the Alliance. In 2001, Loewen was the only member of the provincial PC caucus to attend a Winnipeg fundraiser for federal PC leader Joe Clark. In the same year, he criticized the provincial New Democratic government of Gary Doer for not going far enough in extending rights to same-sex couples.