If they had their act together event info would be public instead of locked behind a log in screen. You can’t even contact them without a user/pwd.
Go to WordPress to create a login.
Then log in.
http://overpassesforobamasimpeachment.org/wp-login.php?redirect_to=http%3A%2F%2Foverpassesforobamasimpeachment.org%2F%3Fpage_id%3D28