Story highlights House Speaker Paul Ryan says he's not ready to endorse GOP front-runner Donald Trump

Ryan's said that the Trump campaign is being briefed on the House GOP election-year agenda

(CNN) House Speaker Paul Ryan is tamping down speculation he plans to imminently endorse Donald Trump, revealing that his senior aides are in touch daily with the presumptive nominee's staff in an effort to find common ground on bedrock GOP issues.

And the pair will talk by phone on Wednesday night, though a Ryan spokesman, Zack Roday, said the call was not about an endorsement.

Speaking to reporters on Capitol Hill, Ryan would not say if he is moving any closer to backing his party's standard bearer, despite having "productive talks" with his campaign.

"I don't know where all this is coming from," Ryan said at a briefing over his conference's election-year agenda. "I haven't made a decision. ... and nothing's changed my perspective. We're still having productive conversations."

Ryan's said that the Trump campaign is being briefed on the House GOP election-year agenda focusing on big policy ideas that Republicans largely agree on, including repealing Obamacare and overhauling federal regulations. Ryan and senior GOP leaders hope that the discussions will help Trump align his views more closely to Republicans on Capitol Hill.

Read More