federal election campaign gets tighter, a new poll provides hints on where the parties could see their support grow or shrink — and appears to show a growing split in the progressive vote between the Liberals and the NDP.The Ipsos poll conducted exclusively for Global News suggests that split could create an opening for the Conservative Party, which not only has the most locked-in support but is also seen as the campaign with the most momentum.“Unless the progressives united behind one particular choice, they’re creating a good opportunity for Erin O’Toole and the Conservative Party,” said Darrell Bricker, CEO of Ipsos Public Affairs.Nearly half of Conservative voters surveyed by Ipsos said they are absolutely certain of their vote choice..