I'm gonna take stab here, these are just guesses with no references.

Who funds MS13?

Muslim Brotherhood?

Why did BO instruct HS & BP to release MS13 captures at the border?

To avoid questioning them, they were hitmen.

What agency has direct ties to (2) major drug cartels?

Why is AG Sessions / POTUS prioritizing the removal of MS13?

To avoid violence and import of drugs

Why is AG Sessions / POTUS prioritizing building the wall?

Gang members and drugs

Immigration?

Not so much?

Drugs?

Who do you hire for a hit?

hitman from a drug cartel

Who can be eliminated after the job is complete?

hitman from drug cartel

Seth Rich.

killed by hitman / hitmen

Who was found dead (2) shortly after his murder?

hitmen?

What affiliation did they have?

ms13?

Classified.