The word bromance is a well-known portmanteau of bro or brother and romance. According to the linked Wikipedia article, it means:
a close, emotionally intense, non-sexual bond between two (or more) men. It is an exceptionally tight, affectional, homosocial male bonding relationship that exceeds that of usual friendship, that is distinguished by a particularly high level of emotional intimacy.
Over the last couple of weeks, I heard this word repeatedly used in the media to describe the relationship between Donald Trump and Ted Cruz before they started to engage in mud-slinging at each other and the their bromance seems to have turned sour as their fight intensifies to become the presidential candidate of the Republican Party.
The war of words between presidential candidates Donald Trump and Ted Cruz spilled onto the GOP debate stage, ending the bromance the two men once shared.
Based on the above definition, i.e. emotionally intense bond and tight male bonding, the word bromance doesn't seem appropriate to describe the relationship as they didn't seem to have such a bond. They just pretended to be close and didn't attack each other for their political agenda.
Question: Is there any better or more appropriate word or idiom to describe relationship between two people who pretend to be close to each other for political or commercial gains knowing well their seemingly close relationship will not last long enough?