It’s unlikely questions by themselves would be viewed as illegal especially with Trump team repudiating them and no action taken against anyone.
Via Daily Caller:
Democratic senators want federal investigators to open probes into whether President-elect Donald Trump’s team broke the law when it asked the Department of Energy to identify climate change warriors on staff.
Sen. Richard Blumenthal of Connecticut, and nine of his colleagues, wrote a letter Friday to the Office of Special Counsel demanding to know whether a questionnaire sent by the Trump team to the DOE Dec. 9 “violated long-standing federal laws designed to protect civil servants against coercion for partisan purposes.”