Sen. Chris Coons Christopher (Chris) Andrew CoonsConservative activist Lauren Witzke wins GOP Senate primary in Delaware Coons beats back progressive Senate primary challenger in Delaware Democrats back away from quick reversal of Trump tax cuts MORE (D-Del.) says he plans to ask FBI Director James Comey why he commented publicly on ongoing investigations into Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonBiden courts veterans amid fallout from Trump military controversies Biden looks to shore up Latino support in Florida MLB owner: It's 'very necessary' to vote for Trump MORE prior to the presidential election but did not comment on investigations into then-GOP nominee Donald Trump Donald John TrumpTrump says he doesn't think he could've done more to stop virus spread Conservative activist Lauren Witzke wins GOP Senate primary in Delaware Trump defends claim coronavirus will disappear, citing 'herd mentality' MORE.

"It’s certainly striking that at the time there were ongoing investigations against both candidate Trump and candidate Clinton, and the FBI director chose to comment on one but not to comment on the other,” Coons told CNN on Wednesday morning.

Comey will return to Capitol Hill on Wednesday morning to testify before the Senate Judiciary Committee.

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"I will ask him about why he chose to comment on one and not the the other and in particular how he sees the future of the FBI and what they’re going to learn from the impact they had,” said Coons, a member of the committee.

He said he was “less interested really in relitigating the 2016 election.”

Coons's comments come one day after Clinton placed blame for her election loss on Comey’s letter informing Congress of the discovery of emails possibly related to the FBI's investigation of Clinton's use of a private server while secretary of State and whether she mishandled classified information.

“I was on the way to winning until the combination of Jim Comey’s letter on Oct. 28 and Russian WikiLeaks raised doubts in the minds of people who were inclined to vote for me, but got scared off,” Clinton said Tuesday, referring to emails published on WikiLeaks purportedly from the Democratic National Committee and Clinton campaign chairman John Podesta. Russia has been widely blamed for providing the hacked emails to the website.

Coons said he was confident Comey would be asked by committee members whether he believes his actions cost Clinton the election.

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But he added he believes “a lot of different factors” contributed to the election outcome.

He said he’s more interested in "figuring out how we secure our next elections from foreign interference and what lessons the FBI director and the FBI as an organization has learned about the deviation from their historic practice of not making comments on their investigations, particularly those that are explosive so close to an election.

“It’s important for us to understand why the current FBI director chose to insert himself in the last days of the election in the way he did."