Where Trump's support- and opposition- is likely to come from in the Senate

Silver also has an interesting analysis of which senators in each party are most likely to support or oppose the Trump agenda.

Given Trump's lack of conservative orthodoxy and consistency, he can expect more resistance from members of his own party than presidents usually get. There are also senators- Ben Sasse of Nebraska comes to mind- who are actually rather similar to Trump on the issues but have opposed him because of his personality and questions about his personal fitness for the office.

All in all, it's going to be an interesting four years on the Hill.