The Coalition has surrendered its lead to Labor for the first time since Malcolm Turnbull became Prime Minister.
The latest Newspoll shows the Bill Shorten-led opposition has pulled ahead, 51 per cent to 49 per cent, in two-party terms.
Amid mixed messages about the governments tax policy and tensions between the Prime Minister and Treasurer Scott Morrison, support for the Coalition has tumbled to a six-month low as Mr Turnbulls own standing continues to slide just 88 days out from a possible double-dissolution election.
If this result was repeated on election day, the Coalition would lose the election after just one term in power. Mr Turnbull has earmarked July 2 for an election if the Senate does not pass industrial relations bills when it is reconvened in two weeks.
The Newspoll reveals the governments primary vote has fallen to 41 per cent. It has dropped five points since the start of the year.
It comes as new polling reveals that voters strongly oppose giving states the power to levy their own income taxes. Newspoll found the idea deeply unpopular among voters, with only 19 per cent in favour of enabling states and territories to levy income taxes, 58 per cent opposed.
When Mr Turnbull launched his challenge last September he cited as one factor that Labor had led the government for 30 consecutive Newspoll surveys.
