CHALLENGERS to the Coalition-held seats of Mallee and Farrer face one of the toughest tasks in federal politics ahead of the May 3 election.

Australian Prime Minister Anthony Albanese ended months of speculation on Friday when he announced the election date following a visit to Governor-General Sam Mostyn.

The Nationals' Anne Webster (Mallee) and Sussan Ley (Liberal, Farrer) hold two of the safe...