Kevin O’Leary is still Conservative members’ first choice for party leader, according to the latest iPolitics CPC Leadership Tracker powered by Mainstreet Research — but Andrew Scheer is now closing in on O’Leary and Maxime Bernier’s falling behind.

From April 18 to 22, Mainstreet — which conducts its poll with an official party membership list – reached 2,135 Conservative Party of Canada members and found (with a margin of error of +/- 2.1 per cent, 19 times out of 20) that O’Leary was the first choice of 26.32 per cent of Conservative members.

For the first time in the race, Scheer is now in the number two spot at 16.72 per cent followed by Bernier at 14.19 per cent.

Mainstreet Research President Quito Maggi said this is the first time a candidate other than Bernier has been in second place in over two months.

In early February, Kellie Leitch was in second place.

“Scheer has momentum,” said Maggi. He said that the numbers are clearly beginning to shift.

It’s also the first time O’Leary has polled at over 25 per cent in three weeks. Maggi said that while this is good news for O’Leary, it also means that he’s losing more support on second ballot.

Bernier dropped five points since last week, he’s down from 19 per cent to 14.

Maggi said it’s hard to determine whether Bernier is actually losing support or if the other shifting votes are affecting the overall percentage because he’s been polling fairly consistently.

The numbers will shift again once the final membership list is released in about two weeks.

Erin O’Toole also has lost support this week — he’s down three points. Maggi said Scheer and O’Toole are fighting over the same voter pool, comprised of CPC members who are looking for anyone but Bernier or O’Leary.

WATCH: Mainstreet Research President Quito Maggi and iPolitics Executive Editor Stephen Maher discuss what the race data is looking like, one month out.

The iPolitics CPC Leadership Tracker, powered by Mainstreet, will be tracking the Conservative leadership race until members pick the next leader on May 27. For additional information on methodology and to subscribe to in-depth updates, click here.