A House microphone picked up Hoyer calling McCarthy a "coward" Thursday night.
The bill appears to be on track for passage before Friday's deadline at midnight.
Sen. Joe Donnelly will vote to roll back actions from last year.
The Democratic leader said a "clean" bill to fund Homeland Security would pass the House.
Lawmakers will vote on legislation to fund the Department of Homeland Security.
Rep. Bill Flores (R-Texas) said he's heard of schoolchildren being barred from handing out candy canes with Christmas messages.
Senators have scheduled a string of votes Friday to pass a bill.
The No. 2 House Democrat appeared to let his feelings slip too close to the microphone.
Vicki Needham 02/26/15 07:45 PM EST
Top White House and several Senate Democrats showed on Thursday that a gulf remains between them...
Rep. Joaquín Castro's (D-Texas) amendment fell short on a 182-243 vote.