There may come a point where former prime minister Helen Clark's continued bid to be the next United Nations Secretary-General becomes damaging for her, Labour's foreign affairs spokesman believes.
That's a factor Miss Clark is likely to consider after two disappointing straw polls, David Shearer says.
"I think she's going to have to make that call herself, we'll get to the point where that (career damage) might be a factor."
Mr Shearer said he believed the latest straw poll figures, in which Miss Clark recorded eight discourages out of 15 votes, would have been discouraging for her.
"Maybe she'll see it through to the third straw poll, see how she goes and maybe make a call after that," he told Q+A on Sunday.
The next straw poll is on August 29.