Doris Layton has sent a letter to NDP members saying she's seen what it takes to be a good politician, leader and statesmen — and like her son, she says Topp has it.
Layton says she watched Topp work alongside Jack during several campaigns, developing policy and building the party.
And she says her son felt confident because of Topp's presence.
She says Layton often said that Topp should never be underestimated or counted out as he'll bring the party to victory.
Topp was the first to declare his intention to run for leadership of the party following Jack Layton's death from cancer last August.
The NDP are choosing a new leader at a convention in Toronto this weekend.