(CNN) Khizr Khan, the Gold Star father who offered a scathing rebuke of Donald Trump at the 2016 Democratic National Convention, endorsed Joe Biden's presidential bid on Monday.

"I'm supporting Joe Biden for President because of the America he stands for and the one he will fight for — the country that my son, Humayun Khan, believed in and fought for so bravely," said Khan, referencing his son, a Muslim American soldier killed while serving in Iraq in 2004.

He continued, "Vice President Biden has always put the country above himself. From the days after he was first elected Senator to his time serving alongside President Obama, Vice President Biden has never wavered in his commitment to our country. President Donald Trump, on the other hand, has consistently chosen self over country, seeking the aid of totalitarian governments to sway elections and undermine our rule of law to serve his self-interest."

Khan plans on campaigning for Biden in New Hampshire next month, a campaign official said.

At the Democratic National Convention in 2016, Khan, with his wife Ghazala at his side, paid tribute to their late son and offered a scathing rebuke of the then Republican-nominee Trump over his attacks on Muslims and immigrants.

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