One day after Donald Trump was elected the 45th president of the United States, his eldest daughter, Ivanka Trump, took to Instagram with a congratulatory message from her youngest son.

"Congratulations grandpa! #presidentelecttrump," she captioned a video of her son, Theodore James Kushner, smiling and clapping.

The seven-month-old wears a Trump campaign onesie in the video.

Ivanka Trump also shared a message to the American people after learning the election results on Wednesday.

"Thank you, America, for the trust that you placed in my father. He will never let you down! #MAGA," she wrote alongside a photo of her family onstage together.