For the first time since taking office, Donald Trump celebrated Father's Day as President of the United States. After First Lady Melania Trump and First Daughter Ivanka Trump decided to send a greeting to the president on Twitter, social media critics didn't hold back.

Father's Day backlash

It didn't take long for Donald Trump to create controversy after he kicked off his presidential campaign back in June 2015. With his family by his side, the former host of "The Apprentice" sent the media into a frenzy just over two years ago when he labeled illegal immigrants from Mexico as "rapists" and "murderers" during his announcement.

While Trump and his campaign was initially thought of as nothing more than a joke, he quickly gained a surprising about of supporters, riding that momentum through the Republican primary and to a general election victory over Democratic nominee and heavy favorite Hillary Clinton. In the months since his election and inauguration, Trump has remained in the hot seat, as critics have been vocal in their opposition to his policy proposals and controversial rhetoric. As seen on Twitter on June 18, Melania and Ivanka Trump decided to tweet out a Happy Father's Day to the president.

Taking to Twitter on Sunday were both Melania Trump and Ivanka Trump who sent a Happy Father's Day greeting to the commander in chief.

"What an amazing year it has been for us all," Ivanka posted on her social media account. "Happy Fathers Day to these two incredible dads!" she concluded, while attaching an image of herself with Donald Trump and her husband Jared Kushner.

Melania Trump also posted a Father's Day message to her Twitter feed. "Happy Father's Day #1 @POTUS," Melania tweeted, while attaching a heart emoji to the end of her post.

Twitter reacts

After posting their tweets, Melania and Ivanka Trump were met with instant backlash from those who oppose the president. "2 dads being investigated by the FBI.

Great indeed," one tweet read.

"You mean 2 treasonous thieves?" another Twitter user rhetorically asked. "What do you get a father who's about to be imprisoned?" an additional tweet wondered.

"He is throwing your step-kids under the bus....How can you wish this man a "happy" anything?" one post read in response to Melania Trump.

"Melania, give us a sign - blink twice - if you need help!" another social media user wrote. The backlash continued as it was made more than obvious that even on Father's Day, the president's critics were not going to stop holding his feet to the fire.