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

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.

both are good

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

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.