Joe Biden is the main reason Netanyahu is not annexing.

There are few politicians who have a keener understanding of polls than Netanyahu. He has several pollsters on his official and unofficial payroll, and keeps in touch with others. His polling brain-trust is heavily American and though they have misled at least once in the past, when he thought that Mitt Romney had a chance of denying Barack Obama a second term in 2012. He is fully aware now that Trump’s chances of winning in November are vanishing.