She has been reaching out to the parents at a detention facility in Port Isabel, Texas, to collect information about their cases and their children.
The remarks comes amid a backlash on the administration's zero-tolerance policy, on those who cross into the US illegally.
Trump recently signed an executive order mandating immigrant families caught entering the United States illegally to be detained together during their proceedings.
An attorney in Texas has been trying to reunite parents at an immigration detention facility with their children after USA authorities separated them on the southwest border.
More than 2,300 children, some as young as 8 months, have been detained by the government in recent weeks as part of the president's "zero-tolerance" policy on illegal immigration.
A spokeswoman for the U.S. Attorney's Office told USA Today that DOJ 'has given our district the necessary resources - including 10 additional prosecutor positions plus at least five Department of Defense attorneys - to prosecute all of these crimes'.
"I can not imagine it being any worse, but we promise to act with strength and resolve", the president said.
"I like the issue for our election, too", he said about Democrats.
The Obama administration also used detention facilities for migrants who crossed the border illegally but it did not engage in widespread family separations.
The mainstream media - so predictably - pounced on the message on her jacket.
Lawmakers on the tour in McAllen said they believed border agents were handling the situation as well as could be expected at the facility for immigrants recently apprehended along the border. She said being told to come back four days later prevented them as members of Congress from performing their duty to oversee government operations.
The U.S. military said on Thursday it had been asked by the government to get ready to house up to 20,000 immigrant children.
"They have a limit as to how much they can manage, and that's maybe a determining factor in how many are released that day", Pimentel said.
And the administration says it will now seek to detain immigrant families during their immigration proceedings, which has also stoked an outcry.
She was on a grueling monthlong bus trip through Mexico when she learned that families were being separated, but she chose to take her chances.
Despite the White House's insistence it can locate the children in its care, major challenges seemingly remain when it comes to family reunification.