GMB union general secretary Paul Kenny and Ed Miliband are due to meet tomorrow in a meeting planned before today's decision to cut funding to Labour by £1 million.
A union source said its was made out of sorrow rather than in anger.
However, according to ITV News political correspondent Carl Dinnen, there are those in the Labour Party who thought it was a deliberate snub ahead of tomorrow's meeting:
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Donald Trump has branded those who take part in terrorist acts as "evil losers" in the wake of a suicide attack at Manchester Arena.
Live ITV News coverage after the explosion at Manchester Arena following a pop concert by US singer Ariana Grande.
What separates us from the terrorists is that we air our grievances with non-violent debate though our democratic structures and processes.