ROBERT SIEGEL, HOST:
According to Bloomberg, President Obama and Mitt Romney have aired nearly 30,000 TV spots addressing the issue of trade with China, and that's just in the past month. Many of those ads aired in Ohio where both candidates are spending a lot of time. NPR's Sonari Glinton explains the Ohio-China nexus.
SONARI GLINTON, BYLINE: If there's a boogeyman in the Ohio presidential sweepstakes, it's China.
(SOUNDBITE OF AD)