Justin Trudeau resumed re-election campaign after several Blackface Images of him emerged.

Conservatives led by rookie Andrew Scheer edged into the lead against beleaguered Prime Minister Justin Trudeau's Liberals, which shed support to smaller leftist rivals less than a month from Canada's general election, according to polls Tuesday.

The two parties had been neck and neck at the start of the campaign.

But new polling taken since Friday by Ipsos, Angus Reid and Ekos -- after several images emerged of Trudeau in blackface makeup -- put the Tories three to five points ahead of the Liberals.

Each survey had a 2.5 to 2.9 percent margin of error.

"The question was not whether damning revelations that Prime Minister Justin Trudeau had participated in the demeaning act of blackface (not once, but on at least three occasions) would hurt Liberal re-election prospects in this election campaign, but how much?" said Angus Reid in a statement.

The polling firm noted that the incumbent Liberals yielded support among younger voters -- a key demographic that helped him sweep to power in 2015 -- to the fourth-placed Green Party.

The Tories' backing, meanwhile, was stagnant as Scheer has been "unable to persuade voters unhappy with Trudeau to look at the Conservative Party."

The three polls have the Liberals ranging between tied or five points ahead of the Conservatives in vote-rich Ontario, with more than one-third of the 338 seats in the House of Commons up for grabs.

The Liberals also still lead in the key battleground of Quebec (78 seats), but saw support there chipped away by the resurging separatist Bloc Quebecois.