Former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE is canvassing Tuesday in Virginia for Jennifer Wexton, a Democrat running in a competitive race against vulnerable Republican Rep. Barbara Comstock Barbara Jean ComstockLive coverage: House holds third day of public impeachment hearings Gun debate raises stakes in battle for Virginia legislature Progressives face steep odds in ousting incumbent Democrats MORE (Va.)

"Voted. Now going out to knock on doors to urge everyone to vote," Comey tweeted.

"Should be fun."

Comey showed up at a canvassing launch spot for Wexton, asked for Wexton stickers and received a script, said Aaron Fritschner, Wexton's communications director.

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"He told me it is his first time canvassing," Fritschner said.

Voted. Now going out to knock on doors to urge everyone to vote. Should be fun. pic.twitter.com/xvofJXSPb9 — James Comey (@Comey) November 6, 2018

“This is beyond Democrats or Republicans or Independents, this is about the values of our country, and I thank you for what you’re doing today... we will be ok because of people like you.” @Comey and his wife Patrice return their canvass packet (we made him say a few words) #VA10 pic.twitter.com/vNEFvYuH11 — Aaron Fritschner (@Fritschner) November 6, 2018

Comstock's seat is seen as a must-win for Democrats as they fight to retake the House majority. The Cook Political Report rates the race as "lean Democratic."

Comey has been politically outspoken ahead of the elections, urging people to vote for Democrats this fall.

"Policy differences don't matter right now," he tweeted in July.

"History has its eyes on us."

Comey and his wife, Patrice Comey, each contributed the maximum amount to Wexton's campaign in September, according to FEC filings.

James Comey said in 2016 that he was a lifelong Republican, but is no longer registered with the party. President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE fired Comey last year.