Territorial and provincial service DeVeber was acclaimed to the
Legislative Assembly of the Northwest Territories in the
1898 election, and re-elected in the
1902 election. This position put him at odds with the
Liberal federal government, led by
Wilfrid Laurier, who wanted the new provinces' governments to be Liberal. A Liberal,
George Bulyea, was therefore appointed
Lieutenant Governor of Alberta, and it was understood that he would appoint a Liberal as the province's first premier. After Alberta's two most prominent Liberals,
Peter Talbot and
Frank Oliver, made it clear that they were not interested, DeVeber considered himself as a possible candidate. DeVeber's belief that he may be appointed premier does not appear to have been well-founded: his opposition to the introduction of party lines earned him the enmity of some Liberals, not least because it aligned him with Haultain, a
Conservative. In the estimation of historian L. G. Thomas, DeVeber's fellow Liberals "were not inclined to take him too seriously" as a potential premier. His time as an MLA was so short he did not sign the rolls in the Alberta Legislature and was never sworn in. While in the Senate, DeVeber chaired the Standing Committee on Public Health and Inspection of Foods. One issue examined by this committee was
water pollution: beginning in March 1909 and for nearly a year afterwards, it studied the question in view of the increasing mortality from
typhoid fever, and concluded, in the words of the
University of Michigan's Jennifer Read, "that the country required some form of legislation to manage the problem. However, it was at a loss about the form it should take and from what body it should emanate." As chair of the committee, DeVeber attended an October 1910 federal-provincial conference in
Ottawa called to attempt to coordinate all Canadian jurisdictions' responses to water pollution. At the same time, DeVeber's colleague
Napoléon Belcourt was championing a similar measure in the Senate (as an Ottawa resident, Belcourt was disturbed by the effect on the city's water supply by the dumping of waste upstream, in
Aylmer,
Quebec), ==Electoral record==