Democratic presidential contenders — including Joe Biden, Pete Buttigieg, Amy Klobuchar and Elizabeth Warren — have official policies of rejecting campaign donations from registered federal lobbyists, but lobbyists still donated to all of them in recent months, new disclosures show.

Some of the K Street cash has already been refunded to the contributors, lobbyists told CQ Roll Call. Other donations may be on their way back, as some of the campaigns said they would return any newly identified contributions from registered federal lobbyists.

Lobbyists have mostly sat on the sidelines of the Democratic primary money chase with many of the contenders rejecting their dollars as toxic, or taking an anti-corporate, anti-K Street approach to policy matters. Candidates who prohibit donations from registered lobbyists are following the policy of former President Barack Obama. Hillary Clinton during her 2016 bid did not ban contributions from registered lobbyists.

Even with the growing rejection of lobbyist campaign cash, more than 30 registered lobbyists disclosed donations to Biden during the second half of 2019, according to recently filed semiannual political money reports to the Senate and House required for federally registered lobbyists. At least some had already been refunded by the campaign to the contributors.

For comparison, about the same number of lobbyists (31) reported they had donated to President Donald Trump during the same period, according to the disclosures. The Trump campaign does not bar lobbyists from donating, and among its donors is former Louisiana GOP Rep. Bob Livingston of the Livingston Group.