Getting the following error when trying to sort my umbraco tags by a date field.

System.Linq.IQueryable

Here's the code

        @if (Model.Content.HasValue("newstags"))
  {


var taglist = Umbraco.Field("newstags").ToHtmlString().Split(',');




foreach (var tagpage in taglist)
{



    var taggedContent = Umbraco.TagQuery.GetContentByTag(tagpage).OrderBy("Id descending");



    foreach (var tagitem in taggedContent.Orderby("newsDate") )
    {

        if (CurrentPage.Id != tagitem.Id)
        {

            var dateofnews = (DateTime) tagitem.GetPropertyValue("newsDate");



            <li><i class="fa-li fa fa-chevron-circle-right"></i><a href="@tagitem.Url"> @dateofnews.ToString("MMMM d, yyyy")    - @tagitem.Name</a></li>
          }

     }


    }



     }

Any thoughts?