I have created a responsive email newsletter that my organization sends out twice a month. I noticed that the newsletter appears totally responsive when viewed in a browser, but only partially responsive when viewed in the inbox. The newsletter is comprised of two independent columns that are meant to merge when viewed on a mobile and this is what happens in a browser, but they stay as two columns and only get "squished" when viewed in the email client on a mobile. Is it possible to get this part of the responsive design to work as it is meant to, in the email client as well?
Here is URL of the last newsletter: