I was able to change the "Displaying Items by tag" page title using a language override so that text is called "News Tagged:". However the page title still shows the site name which looks kind of silly: "News Tagged: Neuro - La Follette School of Public Affairs"
www.lafollette.wisc.edu/news/tag/Neuro

Is there a way to keep the site name from displaying in the page title here? Thanks.

A quick way would be by editing your overrides.

In the tag.php file you could use the str_replace() function to strip out the site's title.

Sounds like that might work, but I'm not familiar with that php command how it would have to be written to work properly. In tag.php would it be added somewhere in this chunk of code?:

<!-- Start K2 Tag Layout -->
<div id="k2Container" class="tagView<?php if($this->params->get('pageclass_sfx')) echo ' '.$this->params->get('pageclass_sfx'); ?>">
<h1><?php echo $this->escape($this->params->get('page_title')); ?></h1>
<?php if($this->params->get('show_page_title')): ?>
<!-- Page title -->
<div class="componentheading<?php echo $this->params->get('pageclass_sfx')?>">
<?php echo $this->escape($this->params->get('page_title')); ?>
</div>
<?php endif; ?>

This the manual for the function.
php.net/manual/en/function.str-replace.php

You need to replace the "- La Follette School of Public Affairs" part from $this->params->get('page_title') with ''.

so you need something like this.

Awesome! Got this to work. Thanks so much.

You 're welcome Andrew.