From his interview this morning with Matt Lauer of the TODAY Show:

.@MLauer asks @SpeakerRyan if a special prosecutor is necessary in the Russian investigation #TODAYonthehill. https://t.co/Q0doUefgnB— TODAY (@TODAYshow) February 28, 2017

Summed up: Ryan says Congress is investigating the issue to "make sure nothing happened that shouldn't have" and that "we need to get answers." He says that will happen through Congress, and wants patience.