Stephen Harper’s Conservatives appear to be losing support, according to a new poll released Monday.

The new Nanos Research nightly tracking survey conducted on behalf of CTV News and The Globe and Mail shows the Conservatives trailing behind both the Liberal Party and the NDP.

The survey, which was conducted this weekend, puts the NDP at 32.7 per cent (up 2.3 per cent from last week) the Liberals at 30.8 per cent (up 0.6 per cent from last week), and the Conservatives at 26.2 per cent (down 2.3 per cent from last week).

"(The Conservatives) had a problem or an issue managing the Syrian refugee affair, and I think that was the emotional trigger for a lot of Canadians," Nik Nanos, chair of Nanos Research, told CTV News.

"It looks like it was the tipping point."

NDP Leader Thomas Mulcair is also Canada’s first choice for prime minister, according to poll respondents.

Nearly 30 per cent of those surveyed selected Mulcair as their preferred choice for leader, with Trudeau in second place at 28.2 per cent. Harper trailed with 25.5 per cent support.

“The Liberals are very well positioned because they are the second choice of New Democrat voters. They’re also the second choice of Conservative voters, which means if Trudeau can create some momentum he’s going to draw from both of the other parties,” Nanos said.

There is a little more than six weeks left until the federal election on Oct. 19.

A random telephone survey is conducted each night by Nanos Research throughout the campaign and each evening a new group of 400 eligible voters are interviewed across Canada. The daily tracking figures are based on a three-day rolling sample comprised of 1,200 interviews. This poll is considered accurate plus or minus 2.8 percentage points, 19 times out of 20.