Rhetoric of this sort just promotes distrust in election systems, which of course prompts demagogues like Trump to promise voters they can fix it if they gain power. The fun thing here is that the right here needs you to believe things that aren't true in order to justify them doing a coup, the stupid thing is that stupid people take this kind of talk seriously.
But seriously, American voting is relatively secure- it's just that where lawmakers don't want voters deciding the 'wrong' way they've gerrymandered them into districts to prevent them doing it, and they've done things to strip voters of their voting rights and to suppress voting and to make it inconvenient or difficult to vote. This has been a bipartisan thing in the past, but today the GOP are the chief offenders.
Also, Putin's Russia is in the stage of democracy where elections are an exercise in flaunting the death of democracy itself, and nobody should ever take his talk about elections as being in good faith, ever
He's mad that there's a move afoot to sell seized Russian assets and use the proceeds to fund Ukraine's defense. The signal is: if you buy these things (yachts, real estate, whatever) Russia will see to it as a matter of official policy that you will fall carelessly out of a high window somewhere. The quiet part said out loud, tho, is that Russia now claims that anything it ever held, whether as the USSR or imperial Russia, or the current Russian Federation, is theirs forever no takebacks.
Basically the read on this should be: Russia is having trouble laundering rubles into non-sanctioned currencies (those foreign assets are basically conduits to do that) and is now saying essentially that if they can't keep our offshore loot they'll just seize all of Eastern Europe and demand tribute from their vassal territories
...of course, if Russia could actually do any of that it already would have