President Trump posted on Truth Social this week that artificial intelligence and the data centers that power it "will be the Greatest Economic Development Engine in History — Bigger than Oil, Gold, Diamonds, or even the Internet." Many commenters on his A. I. posts disagreed. In hundreds of replies to Mr. Trump's Truth Social posts, commenters criticized his enthusiasm, offering a social media snapshot that mirrors recent polling showing Republicans increasingly concerned about the technology.

The New York Times analyzed thousands of comments on Mr. Trump's posts to create a snapshot of what his most loyal supporters are thinking about his pro-A. I. stance. Truth Social, which Mr. Trump created in 2022, has about 6 million users but remains a vital social space for his most ardent supporters.

Overall, comments disparaging A. I. and data centers outnumbered those supporting the technology by nearly four to one. Many critical comments came from users whose profiles suggested they were otherwise staunch Trump supporters and members of his MAGA movement.

Some pushback focused on the intrusion that data centers impose on rural areas. A few users suggested Mr. Trump build a data center at Mar-a-Lago to get a better taste of the disruption. One commenter criticized data centers and A.

I. as tools of mass surveillance. The explosive pushback signals that A. I. and data centers have become a thorny issue for Republicans this midterm season.

A poll published Tuesday by The New York Times and Siena University found that a majority of likely voters oppose building data centers, with 49 percent of Republicans supporting such construction while 47 percent opposed it.