Reading the latest Newspoll numbers could embolden Foreign Minister Kevin Rudd to ramp up his challenge on the leadership of Prime Minister Julia Gillard, which painted the latter as gradually losing her grip of power, at least as far as Australian voters are concerned.

Pitted against the Liberal stalwart, Opposition Leader Tony Abbott, Ms Gillard still enjoys a three-point buffer, with her 40 percent while Abbott's was pegged as 37 percent.

Behind the advantage however, is the reality that Ms Gillard's margin was shaved off by three points from the last survey whereas Abbott gained a single point, underscoring the steady voters' preference decline that Labor has been suffering since last year.

Yesterday's Galaxy Poll pictured Rudd as the Labor figure garnering the most approval among Australian voters, shoring up his chances of returning to the post he lost in late 2010, courtesy of the inner party struggle that led to the ascension of Ms Gillard as the new Labor leader and Prime Minister as well.

Yet if anyone would care to consider the take of Senior Labor Minister Simon Crean, he would declare without doubt that there will be no second coming for Rudd as Prime Minister.

For one, Crean said, Rudd and his supporters within the Labor circle do not have the sufficient numbers to even launch a respectable challenge against Ms Gillard.

"I do not believe a challenge can or will be mounted ... They haven't got the numbers ... All they've got is an attentive ear of any media outlet that wants to run a division line or a leadership challenge," Crean was quoted by ABC Network as saying during a string of interviews on radio and television.

He also recalled that Rudd was booted out because majority of his Labor colleagues deemed him as far from being a team player.

"I think that part of the reason he lost the leadership because he wasn't a team player ... and people will not elect as leaders those they don't perceive as team players," Crean told the Australian Associated Press (AAP).

Considering what has transpired before, Crean declared that Rudd will never regain his post and suggested that as soon as the Foreign Minister accepts that fact, the better for the Labor Party.

"One thing the Labor Party has got to learn is that it doesn't solve its polling problems by simply changing the leader," the senior minister added.

It is best for the party to simply support the current Prime Minister and ensure that she runs a full term "and sooner the party wakes up to that ... the better off we will be," Crean stressed.

The former Labor leader made known his sentiments as Labor continue to languish behind the Coalition, with its primary vote stuck at 30 percent while the Liberals were way up at 45 percent, according to The Australian.

Even when limited to a two-party showdown, Abbott's party will easily crush Ms Gillard's with the Coalition secured at 54 percent while Labor is pinned down at 46 percent.

And the latest numbers clearly suggested that a Labor defeat is almost a certainty if elections were held shortly.

The only way to avert such scenario, Newspoll analysts said, is for Labor to put their acts together and work hard to bring their primary vote to at least 35 percent, regarded by experts as the point in which Ms Gillard will gain a fighting chance.

Crean is convinced that Labor will gain traction in the months ahead and Ms Gillard will have to work doubly hard to convince the public that her decisions were influenced by desires to further advance the economic interest of Australia.

She needs to get the message across that the Labor-led government has so far created more than 700,000 jobs, as reported by The Daily Telegraph, surpassing the achievements of previous governments, Labor and Liberal, Crean said.

And she needs to realise too, as well as other key party figures, that a vacancy on Labor leadership will not happen anytime soon as "there is no capacity for challenge ... there is no contender that has the numbers."

If everyone on Labor admits that fact, the party will sail along just fine, Crean said.