Mas o Menos/Asi Asi
Does it make sense to answer with "Mas o menos" when asked if you like something or someone?"

Example: Do you like "President Trump?" Mas o menos.

When would you use mas o menos versus asi asi?

Question

Mas o Menos/Asi Asi
Does it make sense to answer with "Mas o menos" when asked if you like something or someone?"

Example:  Do you like "President Trump?"  Mas o menos.

When would you use mas o menos versus asi asi?

Answer

How are you? - Mas o menos. A little sick
How was the party? - Mas o menos. A bit Boring. 
She is nice. Isn’t she? Mas o menos. Pretty  unfriendly. 
Are you in love? - Mas o menos. May be
What time is it? - Mas o menos 3 PM

You use “mas o menos” when you are not sure about something, when your answer has to be polite or you think something is ok but could be better.

I hope it helps you

Answer

It is correr to use “más o menos” it is the same that “so so”, it means that you are in the middle of the 2 options. 
But use “asi así” is wrong.

Answer

both are good

Answer

In Spain both of them are ok and have the same meaning, That is, a not too clear opinion about something.

Answer

Si, esta bien que la uses de esa manera, es prácticamente como queriendo decir que no tienes mucha inclinación hacia algún lado respecto a Donald Trump(ni positiva ni negativa) es como un término medio.

El "así así" seria mas como:
 - quieres mas comida?
 - así así esta bien.