Headline: US-Mexico border crossings are down, as Joe Biden says, but single cause is hard to pinpointLink: https://www.politifact.com/factchecks/2024/jun/05/joe-biden/us-mexico-border-cro…Publication Date: Thursday, June 6, 2024Primary Source: PolitiFactNon-Cato Author: Samantha PuttermanAmy ShermanType: articleFormat: Web Only OutletNature of Mention: quotedScholar: Bier, DavidResearch Area: Immigration and Labor MarketsSubjects: a fact-check on Biden's speech about immigration