Fact-checkers use the ClaimReview tagging system to indicate the person and claim being checked, which not only helps Google highlight the articles in search results, it also makes a big database of checks that Squash can tap. Squash’s matching algorithm also makes too many mistakes finding the right fact check. Despite the steady growth of fact-checking in the United States and around the world, and despite the boom that occurred in the Trump years, there simply are not enough fact checks of enough politicians to provide enough matches for Squash and similar apps.