Alberta Premier Alison Redford believes that the Keystone XL pipeline could still be approved before 2013, despite the U.S. State Department's insistence that a deal to reroute the line in Nebraska has not shortened the period for overall approval.

In an extended interview with CBC's chief correspondent, Peter Mansbridge, Redford said there was a sense when she left Washington, D.C., earlier this week that there could still be discussion around the approval date.

The decision to delay a ruling on Keystone allows U.S. President Barack Obama to avoid a potentially divisive environmental issue before the 2012 election.

"I think unless there was a sense that everyone was fully onboard with this process and with this route that it would be very difficult for them to move away from [2013]," Redford said on Mansbridge One on One.

"My sense when I left [Tuesday] was that there was still going to be discussion around that. But I do believe that from the State Department's perspective that they are committed to making sure that this is a process that has integrity and that they get to what will be the right outcome for Americans."

During the wide-ranging discussion, Redford also talks about her role models — Nelson Mandela, former Alberta premier Peter Lougheed and Prime Minister Stephen Harper — and the country's perception of Alberta.