Senator Richard Burr has suspended his role as chairman of the Senate Select Committee on Intelligence (SSCI) while he participates in a federal investigation into insider trading with his stock portfolio.

Last night a search warrant was delivered to Senator Burr’s lawyers and federal investigators scheduled a convenient time to pick up Mr. Burr’s cellular telephone from his Washington DC residence. It appears the cell phone is part of the ongoing review of Senator Burr’s stock trades.

With the investigation progressing, Mr. Burr said Thursday that he wanted to limit distraction to the Senate and informed Senate Majority Leader Mitch McConnell that he would temporarily step aside as chairman of the SSCI while the review was ongoing. Senator Burr will remain a member of the committee and an interim chair will be selected.