According to an analysis by NBC News, the Democratic presidential nominee’s campaign has spent $52 million on television ads, many of which have been concentrated in the battleground states that will be critical in determining the outcome of the election.

The Trump campaign, by comparison, has spent zero dollars.

Even the two third-party presidential candidates, Green Party nominee Jill Stein and Libertarian Party nominee Gary Johnson, have outspent Trump, the GOP nominee. Stein’s campaign has spent $189,000, while Johnson’s campaign has spent $15,000.

When outside groups are factored in, Clinton’s advantage over Trump grows to $91 million to $8.2 million in TV ad spending.