Your form name is incorrect which is clearly visible from your error log:
Code:
**Log**:
('FormNotFoundError', u"no form matching name 'form_id'")
The login form on stratfor.com does not have attribute name so you can not use that form of select_form method. You should use select by order number:
Code:
br.select_form(nr=1)
Test the value of nr until you get it working.