Earlier quoted context omitted.
Serious question from a clueless european here, who should they vote for? To us on the outside, getting filtered news that trickles down, it just seems like there are no candidates. One is 79 and one is 83, where are all the young politicians? Why does the media choose to only emphasize a few of them at the time?
If there's one thing both parties agree with, it's that you can't ever vote for a third party because that's effectively voting for the other major candidate. So the problem of not having more than 2 choices perpetuates indefinitely.
Actually, both major parties (not always at the same time) have a long track record of working very hard to promote voting for third-party candidates, doing things like funneling funds covertly (or simply nudging donors) to fund their efforts, assigning party activists to support third-party efforts, etc.
Of course, they exclusively do this for third parties whose appeal is, or is expected to be, mainly to people whos preference, if choices were limited to the major parties, would be for the other major party.
Because it's not just rhetoric, as long as the electoral system isn't reformed to change this, getting people to vote for a minor party instead of your opponent like demoralizing them and getting them to stay home, or disenfranchising them (two other things the major parties have been known to try to do to populations likely to vote for their opponents otherwise) is a lot easier and exactly half as useful, per voter, as getting them to switch to you from the other major party.