Its a BS "tax funded DOG and PONY SHOW" - they have no authority to arrest anyone - can't force anyone to testify - can't force anyone to appear.
As the article points out - "the panel has not begun substantially investigating possible ties between the Trump campaign and Russia",
- - "does not have a single staffer dedicated to it full-time, and those staff members working on it part-time do not have significant investigative experience".
- - "The Senate Intelligence Committee is typically an oversight panel, not an investigative one. It is set up more to review than to actively probe".
They don't care about "Investigating anything" - they aren't "Truth seeking" - they can't "track down leads".
They do help create the Dem/Media headlines and talking points. They do give the Dem/Media a legal reason to say, "Their under investigation" - "WE are investigating to determine the extent of Russian interference in our election" - = TAX FUNDED DOG AND PONY SHOW