Better yet (in terms of making big bucks at the casino), imagine doubling down on an even money bet (heads/tails, odd/even, etc) until you ultimately hit it.
Say, you have money to cover 6 spins of the roulette wheel with an initial wager of $1000 on Red. ie, bet 1000, lose, bet $2,000, lose, bet $4000, lose, bet $8,000, lose again, bet $16,000, yet again, bet $32,000. (total $63,000)
Now the ONLY way you could lose in 6 spins of the wheel (betting Red each time) is if Black comes out 6 straight times in a row! A 1 in 64 (63 to 1) unlikelihood.
However, in the real world most if not all wheels have a single and a double green zero on them to throw those tremendous odds off somewhat. I’m not sure if all casinos rule it a “push” or not. I think some may take only half your bet if one or the other green zero comes out. Also, in the long run, even if there weren’t the green zeros, you would simply break even. But you would almost certainly be way ahead of the game before that happens.
To use your analogy, we don’t really know if Hillary was the only one betting 6X on red.