Attorneys for former President Donald Trump and two of his adult children moved late Monday to block “unprecedented and unconstitutional” subpoenas from the New York attorney general’s office seeking their testimony. In a court filing Monday evening, lawyers for Trump and his two eldest children, Ivanka and Donald Trump Jr., attempted to quash the subpoenas from Attorney General Letitia James’s office which seek testimony and documents as part of a lengthy civil investigation involving matters including “the valuation of properties owned or controlled” by Trump and his family business. The pair have served as executives at Trump’s company, the Trump Organization. Previously, James’s office had issued a subpoena to Trump seeking testimony and set a Jan. 7 deadline. Trump’s attorneys signaled that they would move to block the subpoena, while another one of his children, Eric Trump, provided testimony in late 2020 following a subpoena. The subpoenas are “an unprecedented …