Bos announced his candidacy for the Labour Party leadership election and won by a landslide with 60 % of the votes .
The Labour Party suffered a landslide defeat in the election losing 23 seats , then Party leader Ad Melkert was blamed for the defeat and resigned .
Bos announced Ad Melkert 's candidacy for the Labour Party leadership election and won by a landslide with 60 % of the votes .
The Labour Party suffered a landslide defeat in the election losing 23 seats , then Party leader Ad Melkert was blamed for the defeat and resigned .