1868 – 20,000 to 30,000 Expedited Naturalizations before Elections in New York City

“As late as 1868, when the Scotchman William M. Tweed was mobilizing the
Irish American vote for Tammany, between 20,000 and 30,000 were
naturalized in New York City courts in the six weeks before election.
Both Democrats and Republicans paid the necessary fees. One judge
naturalized over 10,000 in two weeks.”