Perhaps Flynn isn't the person who could give them the most useful information.

The wishful thinker likes B.

Immunity would be a conflict

Too early in the process to be offering immunity to a key player, especially with the FBI investigation ongoing.

You also don't want another Oliver North to happen. He was granted immunity on the expectation he would testify that Reagan knew what was going on the whole time. Instead he testified he alone ran the operation.

Edited to add: I would think we would want to see a plea deal, not blanket immunity.

used in any prosecution. What they glean before immunized testimony can still be used.

And perhaps he asked for blind immunity and wouldn't elaborate on what he could offer.

that's why

the committees will ALWAYS defer to the FBI so as not to hinder an ongoing investigation.

Check out this article. About 2/3 of the way down talks about how Ollie North's immunity before congress allowed him to skate on criminal conviction.

http://www.esquire.com/news-politics/politics/news/a54247/spicer-press-conference-absurd/