The development brought to the forefront questions about White House efforts to control what the former adviser tells Congress about his time in Trump's inner circle - and whether Republicans on Capitol Hill would force the issue.
Some 55 million people across 25 states were under some sort of winter weather advisory, watch or warning on Wednesday.
Republican leaders are racing against a Friday deadline for pushing a short-term spending bill through Congress.
The 21-year-old was discovered in his apartment after he didn't show up for practice Tuesday. He died from an apparent self-inflicted gunshot wound.