There is more pressure building over the Liberal party today, as the Shadow Treasurer prepares to deliver his budget reply speech.
Malcolm Turnbull will give the traditional address at the National Press Club around midday.
And while he'll be taking aim at the tax cuts and spending measures in last week's budget, he'll also be fending off the latest scandal plaguing his own party.
A leaked email to his leader Brendan Nelson reveals he was against the Coalition's promise to cut fuel excise by five cents.
He's now endorsing the policy, and denies passing on the conversation.
The news has rocked the Liberal leadership and Labor's attacked both men saying they've ‘lost the plot’.