Well, you all know what, I was always on the fence and suspicious of ending fillibuster rule, not anymore! I am against it.
Trump is making a serious mistake asking to change the rule for a temporary legacy which could saddle us years later with government deicts after government edicts.
The Democrats have shown that they will eliminate the rule if it suits them and keep or impose it if suits them. It is some sort of firewall only if it is enshrined in the Constitution itself. As a mere Congressional rule of procedure it only restrains conservatives.