Massachusetts voters give Sen. Elizabeth Warren a 57 percent favorability rating, according to a new poll from the Novus Group.

Among those polled, 38.16 percent had an unfavorable opinion of Warren, a Massachusetts Democrat who has become a frequent critic of President Donald Trump.

Nearly 4 percent said they were undecided on her favorability, and 1.4 percent said they did not know who Warren is.

The poll included 414 Massachusetts voters who were surveyed April 25 through April 27. The poll had a margin of error of plus or minus 4.8 percent.

The Novus Group is a strategic consulting firm.

Warren is running for a second six-year term in 2018, and several Republican candidates are lining up to take her on. Political pundits frequently float her as a possible 2020 presidential contender.

Trump, who won the GOP primary in Massachusetts but lost the state in the presidential election to Democrat Hillary Clinton, has a 38 percent favorability rating and 59 percent unfavorability rating. Three percent said they were undecided about Trump.

Congress received even lower favorable ratings. Just 23 percent of voters gave Congress a "very" or "somewhat" favorable rating.

More than 62 percent said they had a "very" or "somewhat" unfavorable view of Congress, and 12.3 percent said they were undecided.

The poll also asked about "the media." Forty-five percent of respondents had a favorable opinion of the media, while 41 percent said they had an unfavorable view of the media.

The poll results were formally released at a breakfast panel on Trump's first 100 days, moderated by WBZ's Jon Keller. Held at the UMass Club in Boston, the event had UMass Boston as an academic sponsor.