The U.S. Chamber of Commerce is running ads to boost Arizona Republican Sen. Martha McSally as she faces a tough 2020 election.
A spokesman for the Chamber said Thursday that it’s a “substantial” ad campaign with a six-figure budget. He declined to disclose a precise figure.
McSally has lagged Democrat Mark Kelly in fundraising all year. She had $5.6 million in the bank at the end of September, about $4 million less than Kelly.
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