A new poll by DHM Research finds that Charlie Hales and Jefferson Smith are leading the Portland mayor's race.
New Seasons founder, Eileen Brady, appears to be losing momentum. If no one candidate garners 50 percent of the vote in Tuesday's election, the two leaders will advance to a November runoff.
The Portland polling firm, DHM, called 500 likely voters between Thursday and Saturday.
Thirty-two percent of respondents said they'd vote for Charlie Hales. That's up seven percent since a similar poll last month.
Twenty-four percent of respondents said they'd vote for Jefferson Smith -- up from 20 percent in April.
But Eileen Brady did not do well in the poll. The percentage of people who said they'd vote for her has dropped over the last month from 23 percent to 16 percent.
A large number of voters remain undecided -- 21 percent. But lead pollster, Tim Hibbits, says they appear to be breaking for Hales and Smith, rather than Brady.
The DHM poll also looked at the race for position one on the City Council.
Remarkably little has changed there. Amanda Fritz is still in the lead with 33 percent. That's just one percent more than a similar poll last month.
Mary Nolan maintained 25 percent.
Nolan and Fritz remain well ahead of their other challengers: Bruce Altizer, Teressa Raiford and David Gwyther. But as with the race for Portland mayor, many voters remain undecided.
By Saturday, 38 percent of likely voters still hadn't decided whom they were going to back.
The DHM poll has a margin of error of plus-or-minus 4.9 percent.
OPB photographers follow the candidates for a day.
This story originally appeared on Oregon Public Broadcasting.