Which of the following is a constitutional power of the senate? a. initiating revenue bills b. impeaching federal officials c. confirming presidential appointments d. the senate does not have any of these powers.

The correct answer is B. impeaching federal officials. 

Under the Constitution, the Senate has the sole power to try all impeachment trials, serving as jury and judge. The impeached officials were automatically removed upon the conviction of the Senate. The Senate has tried seventeen federal officials and two presidents since 1789. 

Blue ridge is the correct answer.