Issuing a Sapina to a Member of Congress?

The january sixth committee has asked members of congress to answer questions about what happened on January 6th. Two republicans have so far refused the request for an interview. CNN's Jake Tapper says this could have major political ramifation, and it goes to the purpose of republicans wanting to makejanuary sixth out to be just another day. The next big question is how does the committee respond? At this point, they've been reluctant to say that they're willing to take the next step of issuing sapinas to their fellow members of congress. We could get more clarity later this week.