"The irony here is that this president is talking about a wall because this is going to keep out so-called terrorists - which we know is not true - in the interest of public safety when each day he's choking the actual people who are responsible for public safety", Harrissaid.
"I will make my decision soon, not at this very moment", Ms. Harris told CNN in an interview.
The Senator from California is now on her book tour.
Her book "The Truths We Hold: An American Journey" hit the book stores on Wednesday.
At a book event Wednesday night at George Washington University in D.C., Harris batted away reporters' questions about a pending 2020 announcement.
When asked if the "likability" challenge that so many women in leadership positions face still exists, Ms. Harris recalled a powerful lesson her mother taught her when she was younger.
Harris said she was blessed with a nurturing, happy, healthy childhood, but has been dismayed by Trump's vilification of immigrants.
"That being said, I take full responsibility for anything that has happened in my office", she said. "But with each woman who gains success, I think there is a greater appreciation and understanding of the capacity and breadth and depth of who women are and what we can do", Ms. Harris said. It has been my life's experience that the American people are smart and they make decisions about what's in the best interest of their household, their family and their community.
Trump has run into trouble fulfilling his defining campaign promise to build a wall paid for by Mexico, Harris said, and now he is trying to get Congress to bail him out.
In 2014, the California Attorney General's Office opposed releasing nonviolent California inmates-part of the state's compliance with a 2011 Supreme Court ruling that found its prison system was unconstitutionally overcrowded-arguing that "if forced to release these inmates early, prisons would lose an important labor pool".
"The president is holding the American people hostage over this vanity project", the California Democrat told MSNBC's "Morning Joe," as federal workers miss their first paycheck in the 21-day standoff between Trump and House Democrats.
"We've had enough of these powerful voices that are trying to sow hate and division among us", Ms. Harris said.