The visit comes a day after President Trump caved to pressure and signed an executive order aimed at ending the family separations that stemmed from his "zero tolerance" immigration policy.
Canadian Prime Minister Justin Trudeau said on Wednesday the U.S. practice of separating immigrant children from their parents on its southern border was "unacceptable."
A federal judge in Sacramento challenges the U.S. government's claim that California sought to hinder immigration enforcement efforts.
Experts say Trump should repeal Attorney General Jeff Sessions' zero tolerance policy for starters.
In the Fox News interview, Lewandowski said his sarcastic comment was meant to mock the other panelist "politicizing the issue of making an example of one particular child."
Trump said he will not end the administration's "zero tolerance" policy of criminally prosecuting every adult who crosses U.S. borders illegally.
U.S. President Donald Trump told Republican lawmakers he would back either of the immigration bills making their way through the House of Representatives.
Trump administration officials have been sending babies and other young children forcibly separated from their parents at the U.S.-Mexico border to at least three "tender age" shelters in South Texas, The Associated Press has learned.
Parscale also said a recent report by the Justice Department's internal watchdog provides grounds for Trump to end Mueller's investigation.
The complaint accuses Sessions of child abuse, racial discrimination and disseminating doctrines contrary to the Methodist church's standards.
Tech executives have previously raised concerns about White House immigration policies, including Trump's travel ban.
Numerous Republicans and Democrats in Congress have now called on the White House to immediately halt the policy, which critics have called inhumane and un-American.
After touring a San Diego-area immigration detention facility holding children, House Minority Leader Rep. Nancy Pelosi, D-Calif., said the Trump administration's policy of separating migrant children from families "must be changed immediately."
Some of Trump's most reliable allies in the media and politics have voiced their concerns for the thousands of children taken from their parents who tried to cross the border illegally.
President Trump later vowed that "the United States will not be a migrant camp ... not on my watch" after blaming Democrats for the child separation policy.
Faced with mounting condemnation of the practice, Trump dodged responsibility for splitting up families.
Trump does not back down from his migrant family separation policy even as condemnation and political risk mount.
The GOP lawmakers add to the mounting backlash Trump faces for his administration's "zero tolerance" practice.
Democratic lawmakers joined protesters outside immigration detention facilities in New Jersey and Texas on Sunday for Father's Day demonstrations against the Trump administration's practice of separating children from their parents at the U.S.-Mexico border.
About 2,000 children have been separated from their families at the border over a six-week period during a crackdown on illegal entries, according to U.S. Department of Homeland Security figures.