Complex sentence: On May 17,2017, Robert Mueller was appointed by the United States Department of Justice as special prosecutor to investigate Russian interference in the 2016 United States elections and the same day Great America Committee was registered with the Federal Election Commission.
Split into simpler sentences: On May 17,2017, Robert Mueller was appointed by the United States Department of Justice as special prosecutor to investigate Russian interference in the 2016 United States elections. On the same day, Great America Committee was registered with the Federal Election Commission.