Sen. Rand PaulRandal (Rand) Howard PaulSenate Democrats to hold caucus meeting Wednesday with ex-ISIS envoy Partisan squabbles endanger congressional response to Trump's course on Syria Paul blocks vote on House-passed Syria resolution for second time MORE (R-Ky.) blocked a resolution calling for special counsel Robert MuellerRobert (Bob) Swan MuellerFox News legal analyst says Trump call with Ukraine leader could be 'more serious' than what Mueller 'dragged up' Lewandowski says Mueller report was 'very clear' in proving 'there was no obstruction,' despite having 'never' read it Fox's Cavuto roasts Trump over criticism of network MORE's report on the Russia probe be made public, marking the fifth time Republicans have blocked the House-passed measure.
 
 
"What we're talking about is basic transparency, let's make sure the full Mueller report is released to Congress … and then let's make sure the American people see as much of this report as possible," Warner said from the Senate floor. 
 
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He added that to warn future campaigns and candidates about potential election interference "we need to fully understand what the Russians were trying to do."
 
Under Senate rules, any one senator can request that any bill or resolution be passed. But because it requires the signoff of every senator, any one senator can also block their request.  
 
Paul objected because Warner wouldn't agree to amend the nonbinding House-passed resolution to include provisions calling for the public release of communications between several Obama-era officials including former President Obama, former FBI Director James ComeyJames Brien ComeyCNN's Jeffrey Toobin says he regrets role in playing up Clinton email story Federal prosecutors interviewed multiple FBI officials for Russia probe review: report State cites 38 people for violations in Clinton email review MORE and former CIA Director John BrennanJohn Owen BrennanBrennan's CIA a subject of Barr's review of Russia investigation: report Federal prosecutors interviewed multiple FBI officials for Russia probe review: report Trump denies knowledge of Barr meeting in Italy, says it would be appropriate MORE.
  
Paul argued that Congress still needs to figure out the "entire story" including the origins of the investigation into President TrumpDonald John TrumpGraham to introduce resolution condemning House impeachment inquiry Support for impeachment inches up in poll Fox News's Bret Baier calls Trump's attacks on media 'a problem' MORE's campaign and a controversial research dossier compiled against then-candidate Trump. 
 
"I think it's very important that we not turn our country into this back and forth where each successive party tries to use the apparatus of government to investigate the previous president," Paul said. 
 
 
Paul has warned that he would block the resolution backing the Mueller report's release unless information about the opposition research dossier compiled against Trump was also released. He first blocked the House-passed resolution last week. 
 
"It was so scandalous and so unverified and has turned out to be untrue, and yet this was the basis for the beginning of the investigation. This was the basis for doing something extraordinary," Paul added on Thursday of the dossier. 

A 2018 memo from the House Intelligence Committee, which was controlled at the time by Republicans, found that the FBI's counterintelligence investigation into whether Trump campaign officials had improper contacts with Russia was triggered by information the bureau obtained about George Papadopoulos, a former adviser to the campaign. 

Thursday's floor drama comes after The New York Times reported that some members of Mueller's team believe the four-page letter from Attorney General William BarrWilliam Pelham BarrBrennan's CIA a subject of Barr's review of Russia investigation: report Pelosi releases 'fact sheet' saying Trump has 'betrayed his oath of office' Federal prosecutors interviewed multiple FBI officials for Russia probe review: report MORE that summarized the principal conclusions didn't sufficiently portray their findings, which they suggested could be more damaging to Trump than Barr conveyed.
 
It marks the fifth time Democrats have tried to pass the House resolution, which says there is “overwhelming public interest” in the government releasing the contents of the high-profile Mueller report. The resolution calls on the Justice Department to fully release the report to Congress and to release it to the public “except to the extent the public disclosure of any portion thereof is expressly prohibited by law.”
 
Mueller handed over his report to the Justice Department, marking the formal end to his two-year investigation. Barr is expected to testify on the report early next month.
 
 
Sen. Lindsey GrahamLindsey Olin GrahamGraham to introduce resolution condemning House impeachment inquiry Overnight Defense: Trump's Syria envoy wasn't consulted on withdrawal | McConnell offers resolution urging Trump to rethink Syria | Diplomat says Ukraine aid was tied to political investigations Partisan squabbles endanger congressional response to Trump's course on Syria MORE (R-S.C.), the chairman of the Senate Judiciary Committee, has also blocked the House-passed resolution.
 
Graham voiced opposition to the resolution, citing Senate Minority Leader Charles SchumerCharles (Chuck) Ellis SchumerTurkey says soldier killed despite cease-fire in Syria Schumer calls for FDA to probe reports of contaminated baby food How Trump and Pelosi went from bad to worse MORE's (D-N.Y.) refusal to amend it to include a provision calling on the Justice Department to appoint a special counsel to investigate alleged department misconduct in the handling of the investigation into 2016 Democratic candidate Hillary Clinton's email use and the Foreign Intelligence Surveillance Act applications related to Trump campaign adviser Carter Page.