MVC :: Put A Login.ascx On All Pages?

I would like to put a login.ascx on all pages. I would like if I write in my datas with error the usercontrol shows the error and stays on the same page.

Where I am:

<% using (Html.BeginForm("Login",
"Login"))
{ %>
<%=Html.TextBox("email")%>
<%=Html.ValidationMessage("email","*")%>
<%=Html.TextBox("password")%>
<%=Html.ValidationMessage("password","*")%>
<% } %>

My login controller validates input put the errors in modelstate. Now I want to redirect to my original page (whatever it was)
WITH the modelstate.

Is it possible somehow?

I can redirect with: Response.Redirect(HttpContext.Request.UrlReferrer.AbsolutePath); but it is another roundtrip the modelState is cleared.