Putting Posts In iframe (Prologue Theme)

I am trying to put blog posts into an iframe on the prologue theme. The reason I want to do this is to allow for a page refresh for users posting via e-mail. If I refresh the whole page it won’t allow people to post in the form on the page.

I have taken the contents of the index that generate the posts and placed them on a separate page called posts.php. I am getting a Call to undefined function: have_posts(). I copied the rendered code from the header and have all of the php pieces from the index. Any ideas?