Ivanka Trump Shares Adorable Video of Daughter Singing to Her Newborn Baby Brother

It's not all tough talk in the Trump family.

In an adorable video posted to Instagram by Ivanka, Donald's granddaughter is seen singing Twinkle, Twinkle Little Star her newborn baby brother.

Ivanka recently gave birth to Theodore, her third child.

Read: Melania Trump Reassures Voters That Her Husband 'Treats Everyone Equal'

"Arabella serenading her new baby brother," Ivanka, Trump's eldest child, wrote Monday.

 

Arabella serenading her new baby brother. ?

A video posted by Ivanka Trump (@ivankatrump) on Apr 4, 2016 at 1:08pm PDT

Theodore, who was born March 27, and 4-year-old Arabella have a 2-year-old brother named Joseph.

The Kushner side of the Trump clan is lending something of a soft edge to the billionaire presidential candidate as his campaign enters its most difficult phase to date.

Read: Ivana Trump Says We Need Immigrants To Vacuum Our Living Rooms

After a string of impressive victories, Trump is up against discouraging numbers as Wisconsin voters hot the polls Tuesday. 

Trump also has a steep hill to climb with women, who view him unfavorably more than 3 to 1, according to a New York Times/CBS poll.

The campaign also hopes Trump's wife, Melania, can help appeal to women. On Monday, the former model appeared with Trump on the campaign trail in Wisconsin.

Watch: 'First Women' Author: Melania's Modeling Past Could Help The Trump Campaign