U.S. presidential candidate Donald Trump is in the crosshairs of Anonymous as the hacktivist collective is threatening to "dismantle his campaign" and "sabotage his brand."

The group plans to carry out attacks in the form of a massive distributed denial-of-service (DDoS) attack, targeting the election websites of Trump and rendering them offline. More than that, it's out to expose any information that'll ruin the Republican candidate's chances of winning the election.

Anonymous posted the video several days ago on March 4, announcing a "call to arms" and declaring a "total war" against Trump because of his "hateful campaigns" and "personal greed." To spread the word, it is using the hashtag #OpTrump.

The footage continues to ask anyone "able with a computer" to participate in the operation, noting that everyone even without a knack for hacking can help by simply sharing the video.

Anonymous will start the cyber attack on April 1, initially concentrating on trumpchicago.com. Other than that website, the collective also uploaded a couple more on Ghostbin, including Trump's personal and business websites donaldjtrump.com, trump.com, trumphotelcollection.com, trumptowerny.com, trumpvegascondos.com and trumpchicago.com as well as election websites donaldtrump2016online.com and citizensfortrump.com.

The group also posted various information of Trump, from his social security number and birthdate to his cellphone number and children's names. However, these are unverified details.

The post indicates that Anonymous has already hacked Trump's voicemail and leaked embarrassing messages.

This isn't the first time Anonymous and Trump had a run-in with each other. Back in December 2015, the hacking group also declared war against the Republican candidate when he said that Muslims should not be allowed to enter the United States. The attack got plenty of websites taken down at that time, but it did not have a long-term effect.

Needless to say, Trump has gotten himself in hot water, facing a great and massive collective of skilled hackers.

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