To pretend that Russia's propaganda involvement plays a significant impact in US elections is contrary to the facts. I'd suggest you check out the Mueller report yourself, because it fails to show any actual substance.

Furthermore, other countries, such as Israel, play FAR bigger role in influencing US elections. Same goes for US oligarchs and large corporations. The fact that liberals in US continue to focus on Russia, while ignoring this shows that this is not rational adult behavior.

Finally, it's worth noting that US itself does far greater interference in elections and politics across the globe.