Morning Mail: Australia’s Signal concern, supermarket prices compared, Dutton to reveal cost-of-living policy

There may be local repercussions from a major security breach in the White House after war plans were shared on the Signal app. Photograph: Thomas Trutschel/Photothek/Getty Images

Morning everyone. Australia and other US intelligence allies should be “very worried” about the Trump administration’s response to the leak of secret military planning, according to Canada’s former spy chief. We have the latest from Washington on the Signal fiasco – including the publication of fresh details of this shocking security breach.

After voting against Labor’s surprise budget tax cuts, the Coalition has proposed its own cost-of-living measure, a temporary cut to the fuel excise. Plus we look at whether Trump is going to make us pay more for our medicines and which supermarkets are cheapest.