what the fuck is "triangulating" someone?
serious question lol
As above summarized by jmdrake, it's creating a situation where you, or your desired outcome comes away being perceived as the more attractive of three options. In a
classic triangulation example, a leader can manipulate a policy battle in his favor by having a surrogate in Congress or the media raise a stink by voicing his party's view in a deliberately inflammatory manner (A), that instantly draws an equally overheated response by the opposition (B). The leader then steps in and, instead of focusing on attacking the opposition, introduces a measured, carefully prepared, non-heated variation of A that makes him look like the statesman (C) and the desired policy look like the most reasonable course. Other variations:
Movement triangulation: instead of attacking the contender whose voters represent a movement you want to attract (A), agree with him on X,Y,Z where you can, and respond to the extreme attacks on that candidate (B), then introduce your version as the best way to get to X,Y,Z (C). This communicates you are on the same trajectory as the other candidate without confrontation, so supporters can view you as a friendly alternative.
Theft Triangulation: Outright stealing the other candidate's ideas (as Cruz has done to Rand) is a cruder way to show those supporters you are 'another place to go' (making them think, "hey, why should I stay with my guy who's at 2%, when the other guy who will get me what I want is at 20%?"). In this case
two undesirable situations are being triangulated---struggling candidacy (A) versus succeeding candidates you absolutely oppose (B)---to make your 'better off' candidacy (C) the one they settle for.
Reverse Triangulation: If you are already the perceived marginal or 'extreme' party, it's possible create a desired outcome by forcing the opposing side to overreact, causing the public to become aware that your side is the preferred alternative. A real world example of this was the "gun for tots" street theater pulled off by LP activists in NYC in 2002. The city council was planning to pass a bill banning brightly colored toy guns without much fanfare or notice in the news, so in protest the party decided to go to Harlem and hand out colored toy guns to kids on the day of the hearing (A). The liberal NY media and pols went ballistic on the local LP (B), of course, but the alerted public sided with us that the toy ban was a silly idea (C)
and so the bill didn't pass.