President-elect Barack ObamaBarack Hussein ObamaPandemic preparedness and response under a different president Wall Street Journal: Trump stretched law with executive orders, like Obama Trump's contempt for advice and consent MORE may have succeeded in defeating Sen. John McCainJohn Sidney McCainBill Maher delivers mock eulogy for Trump Hillary Clinton roasts NYT's Maureen Dowd over column CNN's Ana Navarro to host Biden roundtable on making 'Trump a one-term president' MORE (R-Ariz.) earlier this month in part due to an advantage in local advertising, a new study said Wednesday.

The television research organization Nielsen found that Obama aired 1.5 times as many ads as McCain on the local level, while McCain kept better pace in national advertising.