Twenty-six percent of Canadians said the SNC-Lavalin scandal will influence their vote in the 2019 election in October, according to a survey issued by Nanos on Sunday.

Before former Justice Minister Jody Wilson-Raybould's shocking public testimony last Wednesday alleging 11 senior government officials' pressure and "veiled threats" in the SNC-Lavalin case, 17 percent of Canadians said the SNC-Lavalin scandal will be a factor when they vote in the 2019 election.

However, two days after the explosive hearing, the number of concerned respondents jumped by nearly 10 percent to 26 percent, while 8 percent said they were unsure if the scandal will influence their votes.

The survey also shows Prime Minister Justin Trudeau's personal brand has taken a hit since Wilson-Raybould's testimony.

Before the former justice minister testified, 14 percent said they considered Trudeau the most ethical federal leader. At the time, Trudeau ranked third behind Green Party Leader Elizabeth May, at 23 percent, and Conservative Party Leader Andrew Scheer, at 21 percent.

But by Friday, Trudeau sank to 10 percent support, putting him in the fourth position behind New Democratic Party Leader Jagmeet Singh, who had 11 percent.

May appeared to pick up most of Trudeau's eroded support, gaining 5 percentage points to put her at 28 percent by Friday.

The survey also found that Canadians are split over which party, if elected, would be more ethical. Thirty-four percent said Trudeau's Liberals would be more ethical in government, a small drop from 39 percent last Monday.

Scheer's Conservatives earned the same amount of confidence, at 34 percent. That number has not changed since Wilson-Raybould's testimony.

Wilson-Raybould, who resigned from Trudeau's Liberal cabinet earlier last month, said that between September and December last year, she "experienced a consistent and sustained effort by many people within the government to seek to politically interfere in the exercise of prosecutorial discretion in an inappropriate effort to secure a deferred prosecution agreement with SNC-Lavalin."

The company was charged with fraud and corruption four years ago over allegations that SNC-Lavalin paid nearly 36 million U.S. dollars in bribes to public officials in the former Libyan government of the late Muammar Gadhafi and defrauded Libyan organizations of an estimated 98 million U.S. dollars between 2001 and 2011.

The survey was commissioned by CTV News and was conducted by Nanos Research.

Nanos conducted the first telephone and online random survey among 1,000 Canadians, 18 years of age or older, between Feb. 23-26, 2019. It did a second survey with the same method on 750 Canadians. The sample for the second survey was drawn from the first group of surveyees, to allow for a direct comparability on the impact of the testimony.