It doesn't look like your webserver is running. Start it and try again
nmap www.democracystraightup.org
rDNS record for 52.45.15.71: ec2-52-45-15-71.compute-1.amazonaws.com
PORT STATE SERVICE
22/tcp open ssh
80/tcp closed http
443/tcp closed https
If that does not help, make sure your DNS record is still pointing to your EC2 instance. And, make sure your EC2 Security Group has ports 80 and 443 open