Minutes before time ran out on Monday's budget vote, two senior Conservatives swooped into the chamber claiming their electronic voting app wasn't working and declared they wanted to vote against Prime Minister Mark Carney's first budget.

MPs Andrew Scheer and Scott Reid, the party's House leader and caucus chair respectively, could have voted "nay" in the chamber just moments before. But they didn't cast their votes until all of their colleagues had finished.

While video footage appears to show two people standing behind curtains on the Conservative side of the House of Commons as the count was underway, Scheer's chief of staff told CBC News Tuesday it wasn't him or Reid.

After it became apparent the budget was going to pass thanks to two NDP abstentions but also two other Conservative

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