In 1990, the Indian-born population of the United States was roughly 450,000.[3] The Census did not track "Asian Indian" as a separate category until 1980. There were no Indian American members of Congress. No Indian American had ever served.
Today, five Indian Americans sit in the House of Representatives: Ami Bera, Pramila Jayapal, Ro Khanna, Raja Krishnamoorthi, and Shri Thanedar.[1] All five are Democrats. Jayapal chaired the Congressional Progressive Caucus. Khanna co-chaired Bernie Sanders' presidential campaign. Thanedar represents a Detroit district. Krishnamoorthi represents suburban Chicago. Not one Republican among them.
The Indian-born population grew from 450,000 to 3.2 million between 1990 and 2024 - a 611% increase driven almost entirely by the H-1B visa program and chain migration.[3] The total Indian American population including descendants now exceeds 5.4 million.
Every one of these congressional seats exists because of post-1990 immigration policy.
The Muslim Bloc
Four Muslim Americans serve in the House: Ilhan Omar, Rashida Tlaib, Andre Carson, and Lateefah Simon.[2] All four are Democrats.
Omar represents Minnesota's 5th District, centered on Minneapolis. The district has the largest Somali-American population in the country. Omar was born in Somalia, arrived as a refugee in 1995, and won with 75.2% of the vote in 2024.[2] Her district did not have a significant Somali population before 1990. The community was built by refugee resettlement.
Tlaib represents Michigan's 13th District, which includes Dearborn. In 1970, Dearborn was 97% Caucasian. Today it is 55% Arab - the first Arab-majority city in America.[6] Tlaib won with 70% of the vote. Her parents immigrated from the West Bank. The electorate that elected her was constructed by chain migration from Lebanon, Yemen, and Iraq over three decades.
Carson represents Indianapolis. Simon represents Oakland. Both districts have substantial Muslim populations that did not exist at their current scale before the 1990 Act.
None of these seats would exist in their current form without post-1965 and post-1990 immigration. The communities that vote for these representatives were imported through refugee resettlement, the Diversity Visa lottery, and chain migration.
The Chinese Bloc
Chinese Americans in Congress include Judy Chu and Ted Lieu, both Democrats representing California districts with large Chinese American populations. The Chinese-born population in the US grew from 530,000 in 1990 to over 3 million in 2024.[3]
Santa Clara County - home to Ro Khanna's CA-17, the most Asian congressional district in the country at 57% Asian - went from 82% Caucasian in 1970 to 28% in 2024.[5] Two-thirds of the county's tech workers are foreign-born. 23% are from India, 18% from China. As documented in our Silicon Valley analysis, the H-1B program built this electorate.
Non-Foundational Groups Vote Democratic
The Center for Assimilation defines the foundational population as the demographic groups that defined the nation's character historically - measured at the 1970 baseline or earlier. For the United States, this includes Caucasian European Christian Americans and Black Americans, who together comprised over 99% of the population in 1970. It also includes groups with ties to territories the US acquired over time - Mexicans, Puerto Ricans, Cubans, Hawaiians - who have land-based connections to the country even if they differ from the founding population.
Non-foundational groups are those with no racial, religious, or cultural ties to either the founding population or acquired territories. Indian, Chinese, Korean, Somali, Arab, and Pakistani communities fall into this category. None had a significant presence in the United States before 1965, and most did not reach critical mass until after the 1990 Act.
These groups vote Democratic at rates between 65% and 80%.[4] Academic research by Mayda, Peri, and Steingress found that every 1-percentage-point increase in immigrant share of a county's population increases Democratic vote share by 0.7 to 1.0 points.[4]
The exceptions are narrow. Cuban Americans vote 68% Republican - but Cubans have ties to US-acquired territory and a Cold War political identity that aligns with conservatism. Vietnamese Americans lean conservative for similar anti-communist reasons. These are foundational-adjacent groups with specific historical circumstances. The aggregate pattern holds: non-foundational immigration produces Democratic electorates.
What Didn't Exist Before 1990
The scale of the transformation is best understood by listing what was not there.
In 1990, there were no Indian American members of Congress. No Muslim American members of Congress. No Somali community in Minneapolis large enough to elect a representative. No Arab-majority city in America. No congressional district in the country that was majority Asian.
Today there are five Indian American representatives, four Muslim representatives, an Arab-majority city, and a 57% Asian congressional district. All of these elected officials are Democrats. All of these communities were created by immigration policy enacted in 1965 and accelerated in 1990.
The 1990 Act did not just change the volume of immigration. It created entirely new voting blocs that did not previously exist in American politics. Those blocs now hold seats that determine the House majority. They elect representatives whose policy positions - open borders, identity politics, expanded welfare, progressive social values - reflect the communities that sent them, not the country they serve in.
The Compounding Effect
The mechanism compounds over time. A community arrives through H-1B or refugee resettlement. It concentrates geographically. It reaches critical mass. It elects a representative from within the community. That representative advocates for more immigration. The community grows. The cycle repeats.
Dearborn went from 97% Caucasian to 55% Arab in one lifetime. Santa Clara County went from 82% Caucasian to 28%. Minneapolis gained the largest Somali population outside of Africa. None of this was voted on by the Americans who lived in these places before the transformation began. It was enacted through immigration law - the 1965 Hart-Celler Act, the 1990 Immigration Act, and the refugee resettlement program - without a popular referendum or meaningful public debate.
The foundational population of these communities was replaced. The political representation changed with it. Every seat held by a non-foundational representative is a seat that a foundational American would have held if immigration policy had not created the electorate that elected them.
Sources
- U.S. House of Representatives, Member Directory, 119th Congress
- Al Jazeera, "Re-election for Tlaib and Omar - first Muslim women to serve in US Congress," November 2024
- Migration Policy Institute, "Indian Immigrants in the United States"
- Mayda, Peri, and Steingress, "The Political Impact of Immigration," American Economic Journal: Applied Economics, 2020
- Joint Venture Silicon Valley, Silicon Valley Index 2025
- U.S. Census Bureau, American Community Survey, Dearborn City Demographics
- AAPI Data, "Indian Americans: By the Numbers"
- Pew Research Center, "Key Facts About Asian Americans," 2024