vote.donaldtrump.com has no A record in dns.
In short, this means that there's no server or ip address associated with that url.
No clue why they'd be using cloudflare as I recall 8chan had to evacuate from there.
# host -t ns donaldtrump.com
donaldtrump.com name server megan.ns.cloudflare.com.
donaldtrump.com name server miles.ns.cloudflare.com.
t@t ~ $ host -t a donaldtrump.com megan.ns.cloudflare.com
Using domain server:
Name: megan.ns.cloudflare.com
Address: 108.162.192.197#53
Aliases:
donaldtrump.com has address 104.17.202.89
donaldtrump.com has address 104.17.203.89
# host -t ns vote.donaldtrump.com
Host vote.donaldtrump.com not found: 3(NXDOMAIN)
t@t ~ $ host -t ns donaldtrump.com megan.ns.cloudflare.com
Using domain server:
Name: megan.ns.cloudflare.com
Address: 108.162.192.197#53
Aliases:
donaldtrump.com name server megan.ns.cloudflare.com.
donaldtrump.com name server miles.ns.cloudflare.com.
# host -t ns vote.donaldtrump.com megan.ns.cloudflare.com
Using domain server:
Name: megan.ns.cloudflare.com
Address: 108.162.192.197#53
Aliases:
Host vote.donaldtrump.com not found: 3(NXDOMAIN)