I doubt this. Looking at the past polls, Riley has been more of an outlier showing Bush ahead while Kerry was way ahead it all the other polls. Would be nice to get Oregon though.
Measure 36 will help GOP turnout statewide, and Measure 26-64 will help GOP turnout in Multnomah county.
No Riley has not shown Bush "further ahead". They've shown much weaker support for Kerry, while Bush gets similar support to other polls. Perhaps they, being locals in Oregon, know something about mushy Kerry voters and their likelihood of showing up.