Sen. Rand Paul will insist the name of the whistleblower be revealed during the question and answer phase of President Trump's Senate impeachment trial.

"Senator Paul will insist on his question being asked during today’s trial," tweeted Paul's staffer, Sergio Gor. "Uncertain of what will occur on the Senate floor, but American people deserve to know how this all came about..."

The Kentucky Republican attempted to include the whistleblower's name as part of a question he posed to the floor during Wednesday's session, but Supreme Court Chief Justice John Roberts refused to allow the inquiry to be heard.

Paul, 57, has been a vocal advocate of naming the whistleblower, who he suggested is former CIA analyst Eric Ciaramella. “I think Eric Ciaramella needs to be pulled in for testimony,” said Paul during the House impeachment investigation.

The confirmed identity of the whistleblower remains a mystery as Trump faces trial in the Senate after the House of Representatives passed two articles of impeachment for abuse of power and obstruction of Congress.

[Read more: Schiff hired former colleague of alleged whistleblower Eric Ciaramella the day after Trump-Ukraine call]