Alberta's Minister of Affordability and Utilities, Nathan Neudorf, explains why his government decided to invoke its Sovereignty Act over its feud with Ottawa over its clean energy regulations. Minister of Energy and Natural Resources Jonathan Wilkinson discusses how the federal government plans to respond to Alberta's invocation of the Sovereignty Act. Petro Poroshenko, president of Ukraine from 2014 to 2019, speaks with CPAC on the sidelines of the 15th annual Halifax International Security Forum.