Angela Eagle refused to comment on reports linking Owen Smith with a leadership challenge as she reiterated her call for Jeremy Corbyn to quit as Labour leader.
Ms Eagle has also been touted as candidate to replace Jeremy Corbyn, who is under immense pressure to step down following mass resignations from the Labour front bench.
"It's all about Jeremy considering his position and I don't think speculation about anything else is useful," she told ITV News.
She called on Jeremy Corbyn to do the "right thing for the party and the country" and resign.
"Let's face it the country is in a crisis and we need strong opposition.
The leader of the UK's biggest trade union has said the country is 'riven' as a result of the EU referendum.
Len McCluskey told ITV News that the trade unions can help broker a peace deal and reunite the party now the "coup has failed".
Labour leader Jeremy Corbyn said he would 'reach out' to MPs that oppose his leadership but said they should 'respect democracy'.