If you remove that conditional in the first line of the enqueue function, your scripts should load. I can't see the broader context of why your function is written that way, but if you just copied it from a tutorial or something, you don't need it here.
wp_register_script('sunset-admin-script',get_template_directory_uri() .'/js/news_admin.js', array('jquery'), '1.0.0', true);
add_action( 'admin_enqueue_scripts', 'sunset_load_admin_scripts' );
Please note admin_enqueue_scripts will only enqueue scripts for the back-end of your site, not the front-end. You can replace it with wp_enqueue_scripts if you want it to work on the frontend.