Premier Brad Wall says he favours Saskatchewan Party members voting again on whether or not to abolish the Senate.

Wall said last week that he personally has changed his position from the idea of reforming the upper house, to scrapping it altogether.

He said he came to that decision with difficulty, but reform would be more difficult than abolition.

Update on Pamela Wallin Senator Pamela Wallin has paid back at least $40,000 of the expenses she has claimed from the Senate, according to sources. Wallin's move to pay back some of her expenses was noted about a week ago but it was not known how much, beyond tens of thousands of dollars. The Senator, who represents Saskatchewan, is under scrutiny related to travel claims and per diems. Wallin has refused to discuss the details of her case while an audit is taking place. She also stepped away from being a member of the Conservative caucus in the Senate. On Wednesday, Marjory LeBreton, the Government Leader in the Senate, said the $40,000 figure was "all speculation."

The Sask. Party's official position is that the Red Chamber should be reformed, but Wall said he's given up on that idea.

"It means an equal body where each province has equal representation," Wall said Wednesday. "That's what meaningful reform means and I'd like to see that too ... and I'd like to see money trees in Saskatchewan. They're not going to happen."

A resolution to abolish the Senate was defeated at the party's last convention in November.

But now Wall wants a referendum asking Saskatchewan Party members to vote on the question again.

The party says mail-in ballots will be sent out over the next few weeks, with the results announced in early July.

Abolition is something the Opposition New Democrats already support.

Wall says if his members do too, he will raise it with his counterparts at premiers meetings this summer.

Wall is turning up the heat on abolishing the Senate following the furor over the Senate expense scandal.

Senators Mike Duffy, Pamela Wallin, Mac Harb and Patrick Brazeau have all come under official scrutiny over their expenses.