Fact check: How many immigrants came in to the US illegally under each president

1. Summary of the results

The analyses provided do not contain comprehensive data to directly answer the question about illegal immigration numbers under each president. However, they do offer some specific data points:

Current Trump Administration ^[1]:

• Border encounters reached a historic low of 6,070 in June, representing a 15% decrease from previous records ^[2]
• In the first 100 days of Trump's second term, ICE arrested 66,463 illegal aliens and removed 65,682 aliens, with three-quarters being criminal illegal aliens ^[3]
• The Department of Homeland Security reported a decline in the nation's illegal immigrant population by 1.6 million people since January, driven primarily by self-deportations ^[4]

Biden Administration:

• At its peak, approximately 10,000 unvetted migrants were crossing the border daily ^[2]

The sources focus heavily on enforcement actions and current border statistics rather than providing historical comparisons across different presidencies ^{[5] [6] [7] [8] [9] [10]}.

2. Missing context/alternative viewpoints

The question seeks comprehensive historical data comparing illegal immigration under different presidents, but the analyses reveal significant gaps:

• No historical data for presidents prior to Biden and Trump's current term
• Limited Biden administration data - only peak daily crossing numbers are provided
• Methodology differences - the sources mix border encounters, deportations, and population estimates without clear definitions
• Seasonal and policy variations are not addressed - immigration patterns typically fluctuate based on seasonal factors and policy changes
• Different measurement approaches - some sources focus on border encounters while others discuss overall population changes ^[10]

The analyses suggest that immigration policy organizations, political parties, and media outlets benefit from presenting selective statistics that support their preferred narratives about border security effectiveness.

3. Potential misinformation/bias in the original statement

The original question, while seemingly neutral, contains an inherent assumption that may lead to misleading interpretations:

• Definitional ambiguity - "came in illegally" could refer to border crossings, overstayed visas, or total unauthorized population, but the sources don't provide consistent definitions
• Attribution complexity - Immigration patterns are influenced by multiple factors including economic conditions, global events, and policies from previous administrations, making direct presidential attribution problematic
• Incomplete data presentation - The available sources heavily favor recent Trump administration statistics while providing minimal comparative data ^{[2] [4] [3]}
• Enforcement vs. entry confusion - Some sources conflate deportation numbers with entry numbers, which measure different phenomena ^[3]

The question's framing may inadvertently promote oversimplified comparisons that ignore the complex, multi-factor nature of immigration patterns and the limitations of available data collection methods across different time periods.