Login for The Nation

I am trying to download articles from The Nation. I have a subscription.
When I use the built-in recipe I get the following error:

File "mechanize/_mechanize.py", line 257, in open
File "mechanize/_mechanize.py", line 313, in _mech_open
mechanize._response.get_seek_wrapper_class.<locals >.httperror_seek_wrapper: HTTP Error 404: Not Found

I think this is because the login url for The Nation is no longer,
login_url = 'http://www.thenation.com/user?destination=%3Cfront%3E'

I changed the recipe to
login_url = 'https://www.thenation.com/login'

With this url, I get a different error:
File "mechanize/_mechanize.py", line 809, in __setitem__
File "mechanize/_form_controls.py", line 1964, in __setitem__
File "mechanize/_form_controls.py", line 2356, in find_control
File "mechanize/_form_controls.py", line 2449, in _find_control
mechanize._form_controls.ControlNotFoundError: no control matching name 'name'

I suspect there is something weird with the login form and its labeling, but I have no idea what it is.
Any help is much appreciated.