Transcript for What to Expect From Donald Trump's Capitol Hill Meetings
Reporter: Trump claims he's being audited. Paul Ryan, the speaker of the house making it clear, don't expect an endsement immediately coming out of this meeting with Donald Trump. But what is he looking for today? Reporter: Well, he's made it crystal clear that he eventually wants to endorse Donald Trump. But it will take a long time to get there. So don't expect that to happen today. Look, Ryan is under enormous pressure, George, from his fellow house republicans to come concern here is that trump could run against the house just as he is running against Hillary Clinton to run as a true outsider, really a third party candidate who happens to have the republican endorsement. This member of the house leadership told me that would be They are so far apart on so many issues. what it means to be a republican. Right now they look like two different visions. On the tax return issue, up until now Donald Trump has calculated it would cause him more pain to release them than withhold them but the pressure is going to increase. Reporter: The pressure will absolutely increase, George. He is not the conventional politician and has gotten away with a lot that others couldn't have but on this one he will be forced to release those tax returns, especially now that he has said that he would, every major party nominee for the last half century has released at least the summary of those returns, almost all of them their full returns and he will be under pressure every day to do that in the general election. Yeah, going back to 176. Jon Karl, thanks very much.
This transcript has been automatically generated and may not be 100% accurate.