1 Hillary wins the presidency.
2. Democrats win the house and senate.
It still would not mean anything since anything that manages to get by in the house would be filibustered in the senate. The government would still be stalemated. No immigration reform, no tax reform, no supreme court nomination for at least another four more years. Its been a long time since one party has won the presidency for more than 8 years. Republicans did it in 1980-1992. Democrats did it in 1932-1952. So it would be very hard for Hillary to win more than one election. The election in 2018 would see the Republicans win back the house and 2020 would see a moderate Republican win the presidency. The only thing Hillary could do is to continue to use presidential powers to do some good with climate change and immigration reform.