Canadian James Hinchcliffe was 16th in 1:01.4874. No active driver has won at Toronto more than Power, who has a trio of victories and five podiums in 12 starts.
Hinchcliffe praised the hometown crowds that packed the grandstands surrounding Exhibition Place, and gave him a roaring ovation on his pre-race parade lap.
Vettel was never in realistic contention for victory Sunday, but he was still third entering the penultimate lap - a finish that would have ensured 10 points still separated him from Hamilton.
Schmidt Peterson Motorsports made a driver change this week, removing Mikhail Aleshin from the No. 7 Lucas Oil Honda.
Of course, there might be outside factors that hinder Hinchcliffe from starring in his home country.
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It's been 14 years since a Canadian - Toronto native Paul Tracy - captured the checkered flag here. You get pulled in a million different directions. "But you still have to do your homework, you still have to really think about and execute".
Hinchcliffe is aware of the dangers of being overwhelmed by obligations off the track.
It's been a big turnaround for Hinchcliffe in his hometown race after struggling prior to previous year.
"If I see something, then I'll try and help, and if I don't, then I'll just shut up and see what happens", Bourdais said Thursday. "It's just too bad we got caught by the yellow cause I think we had the best vehicle today but congrats to Josef - it's good that we kept it in the family".
"I'm fortunate to have a good team of people around me who kind of have to play the bad guy sometimes", he added, with a laugh. "I was loose the whole day in Turn 6 - I'd lost a spot there earlier in the day, and then holding Pagenaud off, I got in there pretty deep and just lost the rear - lucky I kept it off the wall".
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"Last year I was the one that won that competition".
Expect Scott Dixon to return to the front. He dealt with a loose vehicle all weekend.
You know you are having a solid season when an eighth-place finish could be described as disappointing.
But Dixon wasn't too upset.
"I won in 2007, a wet but drying race. But if we've gone in the wrong direction, which is easy to do when the field is this competitive, we can fall back on that other set up that was reliable from a year ago". The Chip Ganassi Racing star has been in a class of his own, with his five podiums the most in the paddock - and his most since 2013 (six).
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2017 So Far: Four of the 11 races that have been run were on temporary street circuits similar to Toronto and all four were won by Honda-powered cars: St. Petersburg/Sebastien Bourdais, Long Beach/Hinchcliffe, Detroit 1-2/ Graham Rahal... He said the only "problem" was that this win came at a track where he has previously won.