Rubio claims to be a neocon and to care about the constitution and claims to be for "family values" and yet is endorsing the pro-Russia, pro-Assad, pro-Saddam candidate who hates Cuban Americans, thinks the second amendment does not apply to black people, wants to eliminate the 1st and 4th and 6th amendments, wants to deport millions of people, hates Muslims, wants to deport 12 million people, wants to execute all black people accused of raping white women, is a sexual predator, wants to start a trade war with China that will send the U.S. into a recession, and might start a nuclear war with China.
Rubio is supporting Trump only because Trump wants lower taxes on the rich. There are no other points of congruence between Rubio's stated positions and Trump's actual positions.