Conservative leadership candidate Peter MacKay, Conservative defence critic James Bezan and New Brunswick Southwest MP John Williamson have all signed on along with more than 100 political representatives and foreign policy experts from around the world.
Other signatories to the letter include U.K. MP Damian Collins, who chaired the international grand committee examining privacy and social media misinformation last year, along with members of Parliament from Lithuania, Estonia, the Czech Republic, the European Parliament and the U.K.
There are also several former ministers of foreign affairs, defence and home affairs, along with a broad range of civil society advocates and academics, including Canadian writer Jonathan Manthorpe.
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When the letter first went up on Tuesday, no Canadian MPs had signed on despite there being representatives from other parliamentary institutions in allied countries.
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