Which of the following is currently serving as a US senator of Idaho?

The correct answer is that both Mike Crapo and Jim Risch are currently serving as U.S. senators from Idaho. This is significant because Idaho is represented by two senators in the U.S. Senate, in accordance with the Constitution, which establishes that each state, regardless of its population size, has two senators. Mike Crapo has been in office since 1999, while Jim Risch took office in 2009. Their roles involve participating in the legislative process, making laws, and representing the interests of Idahoans at the federal level. Recognizing that both senators serve simultaneously is important in understanding the structure of representation in the U.S. government.