Warb is correct. The terminology should not be ignored. Virtually all guns owned by US citizens in this day and age are semi-auto. All that means is that the gun auto-cocks every time you fire. You still have to pull the trigger every time. Bump-stocks are a separate issue from the guns themselves.
Since Republicans refuse to ban them, they are absolutely not a separate issue.
Bump-stocks allow semi-auto guns to be rapid-fired with near the efficiency of full-auto. Without the bump-stock, the gun is just like every single other gun anybody uses anywhere in the US for any purpose. The banning of bump-stocks would eliminate the need to ban semi-auto when the argument is that they are equivalent to full-auto when paired with a bump-stock. This makes them separate issues in my opinion.