(CNN) Democrats running for president in 2020 reacted to the deadly shootings at two mosques in New Zealand by condemning hate, with many candidates explicitly calling out global white supremacy and Islamophobia.

The candidates' comments came as President Donald Trump on Friday morning offered his "warmest sympathy and best wishes" to the people of New Zealand, calling the shooting a "horrible massacre." He did not explicitly call out hate against Muslims in his tweet. A separate statement from White House press secretary Sarah Sanders said the US stands "in solidarity with the people of New Zealand and their government against this vicious act of hate."

Without directly naming the President, former Vice President Joe Biden, who is expected to make an announcement about his 2020 plans as soon as April, appeared to rebuke Trump by saying "silence is complicity."

"Whether it is antisemitism in Pittsburgh, racism in Charlottesville, or the xenophobia and Islamophobia today in Christchurch, violent hate is on the march at home and abroad. We cannot stand by as mosques are turned into murder scenes," he tweeted.

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