Since 2016, Democrats have increasingly focused on digital as a way to strike back against the GOP, with liberal Silicon Valley entrepreneurs holding trainings for Democratic campaigns and some liberal insurgent candidates, like Alexandra Ocasio-Cortez in New York City and Ayanna Pressley in Boston, winning recent primaries with minimal television ads and instead relying mostly on digital ones.

The GOP continues to invest in both digital and traditional advertising, but no Republican organization of comparable prominence to Priorities has announced an all-digital strategy. Priorities has even formed its own in-house digital ad agency to build spots for its campaigns, including a previously announced $12 million buy targeting House races.

Damon McCoy, a New York University professor who analyzed Facebook political ad spending data earlier this summer, said Democratic and Republican groups spend at comparable rates on the platform with one significant exception: Trump. The president’s own re-election campaign was the biggest political ad spender in the analysis that McCoy and other academics conducted.

“Removing him (and) the spending is fairly split between liberal and conservative candidates and political organizations,” McCoy said.

Material republished from The Associated Press, with permission.