On the authority of al-Baraa ibn 'Aazib (radhi-yallaahu 'anhu) who said: While we were with the Messenger of Allaah (sal-Allaahu `alayhe wa sallam), he suddenly looked towards a group (of people) and said:

((For what reason have they gathered here?))

It was said: In order to dig a grave.

So the Messenger of Allaah (sal-Allaahu `alayhe wa sallam) became alarmed and startled and he quickly went ahead of his Companions until he reached the grave, then he knelt upon it, and I turned my face towards him (sal-Allaahu `alayhe wa sallam), in order to see what he was doing. He (sal-Allaahu `alayhe wa sallam) cried until the earth became wet with his tears, then he turned to us and said:

((O my brothers! Prepare for a day like this)).

al-Bukhaaree in at-Taareekh, Ibn Maajah, Ahmad and others. It is a hasan hadeeth as indicated by Shaykh al-Albaanee in Silsilah al-Ahaadeeth as-Saheehah

Ref: Fatwa-Online

Shaykh Muhammad Naasiruddeen al-Albaanee said:

"So O Muslims, O you who have sense, is this principle to be applied in this scenario or not? I say yes, because the Muslims in this case are between two evils. Similarly, this is the case if the candidates were Muslims, since amongst the Muslims are Communists, Baathists and so on. Okay, do we just sit back and watch or should we choose the one whose harm is less???"

Ref: The Reality of al-Albaanee's Position on Voting