Senator Chuck Grassley Charles (Chuck) Ernest GrassleyGOP set to release controversial Biden report McConnell locks down key GOP votes in Supreme Court fight Senate Republicans face tough decision on replacing Ginsburg MORE (R-Iowa) on Saturday called on an anonymous leaker with information on alleged Russian officials' conversations with Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE to "end speculation" and release the entire conversation.

"LEAKER: stop tease/leak entire conversation/end speculation," Grassley tweeted.

The Iowa senator leads the Senate Judiciary Committee, which is investigating possible Russian collusion with the Trump campaign during the 2016 campaign.

So much speculation on CNN abt Session/Russian ph call bc of intelligence leak LEAKER:stop tease/ leak entire conversation/end speculation — ChuckGrassley (@ChuckGrassley) July 22, 2017

SessionsRuss ph leak/If the leaker thinks there's a problem leak the FULL text immediately so it can be investigated/help stop speculation — ChuckGrassley (@ChuckGrassley) July 22, 2017

Grassley apparently referred to a report that Sergey Kislyak had spoken to then-Alabama Sen. Sessions on Trump campaign issues, according to Kislayk's accounts of the conversations to Russian officials which were intercepted by U.S. spy agencies.

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The intelligence was leaked to The Washington Post by a former U.S. intelligence official, who also said the conversations included talks of what U.S.-Russia relations might look like under a Trump administration.

Trump blasted The Washington Post article on Saturday, calling the leaks "illegal."

The reported conversations add to speculation about alleged collusion between Trump's campaign and Russia while Moscow was actively trying to influence the election.

Sessions originally failed to disclose a meeting with Kislyak, and then said that their conversations had nothing to do with the Trump campaign.