Well, not every eligible voter voted, and Trump lost the popular vote. The electoral college works in such a manner that the national popular vote doesn't matter, and a minority can elect a president. In fact, a conservative has only once won the national popular vote for President since 1988, and that was Bush in 2004.

The Senate holds a conservative majority because it's structured to represent land rather than people, and conservatives are occasionally able to take the House because they use districting to deprive the majority of voters of the majority of representation.