But he "mistakenly made an inappropriate and insensitive reference to the Holocaust, for which there is no comparison", he said.
He said the comment, made Tuesday at the White House briefing, was personally and professionally disappointing, and he asked for "folks' forgiveness". Christians are preparing for Easter on Sunday, and Jews are celebrating Passover.
House Democratic Whip Steny H Hoyer said Spicer's remarks were "indicative of the extraordinary lack of knowledge, perspective, and sensitivity that the Trump administration has brought to Washington". To know when you screw up that you possibly offended a lot of people.
"Let me explain why we can't accept his apology - it took him three apology attempts to finally sort of get it right", Goldstein said.
Sean Spicer's outrageous comments about Adolf Hitler from Tuesday's press briefing have been mashed up with the closing credits of HBO's Veep, thanks to one savvy YouTube user. "You had someone as despicable as Hitler who didn't even sink to using chemical weapons". And the Anti-Defamation League has offered to help educate Spicer on the Holocaust.
Zeeland Congressman Bill Huizenga says he feels Spicer was not trying to use the comment lightly as an example, but trying to underscore the atrocities in Syria.
Key facts as Texas governor revives push for 'bathroom bill'
Simmons is offering a thoughtful proposal to make sure our children maintain privacy in our school bathrooms and locker rooms. Poor students, many of whom are minorities or come from rural areas, lack the resources of students at rich suburban schools.
"Obviously it was my blunder". Spicer reiterated that sentiment at Wednesday's forum.
Mr Spicer faced calls to quit over his comments, which came a day after the start of Jewish holiday Passover. The attack in northern Syria left almost 90 people dead.
A day later he defended his attacks against the media, telling reporters: "I think sometimes you can disagree with facts".
"I hope people understand that we all make mistakes".
In a statement to White House reporters, Spicer said in no way he was trying to lessen the horrendous nature of the Holocaust. But I'm saying in the way Assad used them, where he went into towns, dropped them down to innocent - into the middle of towns. Eighty-seven people, including children, were killed in last week's chemical weapons attack in Syria.