This is a tough one for the CPC. They (and the LPC and NDP) KNOW with 100% certainty that Canadians oppose, not just don't support, actively oppose funding the military to anything like a useful level.
Plus, there is a small but loud part of the conservative base that says that DND and the CF, as currently structured, cannot make any good use of increased funding. One smallish segment of that opposes all defence spending, on principle, as a waste, while there other, larger group says the CF must be nearly dismantled and repurposed, with almost totally new, maybe even foreign senior leadership before it gets another red cent.