It works for me if I use LWP::UserAgent - note you have to set the user agent string for this site, if the default is used you get a 'banned' message. 
use LWP::UserAgent;
my $ua = LWP::UserAgent->new();
$ua->agent('Mozilla/5.0 (X11; Linux i586; rv:31.0) Gecko/20100101 Fire
+fox/31.0');
my $response = $ua->get('https://berniesanders.com/issues/racial-justi
+ce/');
my $content = $response->content;

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In reply to Re: getting content of an https website by tangent
in thread getting content of an https website by Aldebaran

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