Former FBI Director James Comey endorsed former Vice President Joe Biden’s bid for the 2020 Democratic nomination Tuesday as voters in 14 states and one territory cast their ballots in the Democratic contest.

“Voted in first Dem primary to support party dedicated to restoring values in WH,” Comey tweeted. “I agree with @amyklobuchar: We need candidate who cares about all Americans and will restore decency, dignity to the office. There is a reason Trump fears @joebiden and roots for Bernie. #Biden2020.”

Voted in first Dem primary to support party dedicated to restoring values in WH. I agree with @amyklobuchar: We need candidate who cares about all Americans and will restore decency, dignity to the office. There is a reason Trump fears @joebiden and roots for Bernie. #Biden2020 — James Comey (@Comey) March 3, 2020

The Biden campaign quickly rejected the endorsement, however.

The director of rapid response for the Biden campaign, Andrew Bates, made it clear on Twitter that Comey’s support was not welcome.

“Yes, customer service? I just received a package that I very much did not order,” Bates tweeted in response to Comey’s endorsement tweet. “How can I return it, free of charge?”

Yes, customer service? I just received a package that I very much did not order. How can I return it, free of charge? https://t.co/NK4VrYGzT1 — Andrew Bates (@AndrewBatesNC) March 3, 2020

The endorsement comes on the heels of several major endorsements secured by the Biden campaign on the eve of the biggest day of the Democratic primary, in which more than a third of the total Democratic delegates will be decided. On Monday, Biden received the endorsement from former 2020 presidential rivals Minnesota Sen. Amy Klobuchar, who dropped out of the race Monday afternoon, former South Bend, Indiana, Mayor Pete Buttigieg, who ended his campaign Sunday, and former Texas Rep. Beto O’Rourke, who made his exit last fall. Biden also captured endorsements from former Democratic Senate Majority Leader Harry Reid and former U.N. Ambassador Susan Rice.