WASHINGTON: In March, President Donald Trump signed an executive order calling for the federal govt to share data across agencies, raising questions over whether he might compile a master list of personal information on Americans that could give him untold surveillance power.Trump has not publicly talked about the effort since. But behind the scenes, officials have quietly put technological building blocks into place to enable his plan. In particular, they have turned to one company: Palantir, the data analysis and technology firm.Representatives of Palantir are also speaking to at least two other agencies – the Social Security Administration and the Internal Revenue Service – about buying its technology. The push has put a key Palantir product called Foundry into at least four federal agencies, including DHS and the health and human services department. Widely adopting Foundry, which organizes and analyzes data, paves the way for Trump to easily merge information from different agencies, govt officials said.Creating detailed portraits of Americans based on govt data is not just a pipe dream. The Trump administration has already sought access to hundreds of data points on citizens and others through government databases, including their bank account numbers, the amount of their student debt, their medical claims and any disability status.Trump could potentially use such information to advance his political agenda by policing immigrants and punishing critics, Democratic lawmakers and critics have said. Privacy advocates, student unions and labour rights organizations have filed lawsuits to block data access, questioning whether the govt could weaponize people’s personal information.