The trillion-dollar industry that amasses and shares troves of Americans’ information is confronting a new ethical quandary — the Trump administration’s interest in wielding this data to potentially further its sweeping immigration agenda. Immigration and Customs Enforcement published a request for information in January seeking input on how “commercial Big Data and Ad Tech providers can directly support investigations,” a request that came as the administration was pursuing efforts to expand the United States’ immigration enforcement capabilities. It appears to be the first time ICE has issued a public request on how to use this kind of data, which can include information on people’s purchases, web browsing or social media use. ICE’s request is raising alarms for people like Brian O’Kelley, who helped create the advertising technology industry decades ago. He fears the government wants to purchase the data to open a new front for President Donald Trump’s immigration agenda, even though ICE has not said publicly what it plans to do with the information. “It’s very shocking to see it in black and white that the government …