The Oregon GOP has officially canceled the debate slated for Monday in Portland, per Oregon Public Broadcasting, which would have broadcast the debate:

The two leading candidates, Mitt Romney and Rick Santorum, both declined to appear.

Only Newt Gingrich had accepted the invitation.

Oregon Republican Party chair Allen Alley said everything possible had been done to get the candidates to Portland, but that the campaign has entered a phase where the candidates do not want to debate each other.