A legitimate question. Oklahoma obviously is Safe R at both the presidential and Senatorial levels, but this poll indicates that Abby Broyles is running nearly 10% ahead of Mike Workman, James Lankford's 2016 opponent, and only a few points behind Biden (who himself is running several points ahead of Hillary Clinton). She could very well garner a plurality in Oklahoma County-thereby denying Inhofe an all-county sweep, but he will probably do well enough in Pottawatomie and Seminole Counties to narrowly carry the district.
