Justin Trudeau will overhaul his cabinet today as he gears up to rapidly deliver on a host of priorities for his third term as prime minister.He is expected to add a number of new faces from the Liberal backbench, shuffle the existing roster in some of the most senior portfolios and drop at least one minister altogether.Sources, speaking on condition of anonymity because they weren’t authorized to talk publicly about today’s swearing-in ceremony, say Foreign Affairs Minister Marc Garneau is expected to be dropped from cabinet as Trudeau makes room for fresh blood while maintaining gender parity and regional balance.Environment Minister Jonathan Wilkinson is expected to be moved to natural resources, with a new focus on clean tech.Heritage.