The speech was a departure from the lengthy and direct rebuke of Trump he delivered on Friday, where he mentioned the current President two times and lambasted him for leaning on law enforcement to protect Republicans from prosecution, slammed him for "cozying up" to Russian President Vladimir Putin and faulted him for equivocating about who was at fault during the white supremacist protests previous year in Charlottesville, Virginia. "I'm sorry to say this, but there's one thing you're going to have to live with: the only reason we have an outsider businessman president, is because of you, your lies, your policies and your divisiveness. He is a symptom, not a cause".
Sen. Marco Rubio, R-Fla., (another former Trump opponent) launched into a tweetstorm Saturday morning, bringing up previous controversial statements from Obama and his allies.
Orange County, a Republican stronghold in Southern California, voted for Hillary Clinton in the 2016 presidential election - the first time it went blue in a presidential race since Franklin Delano Roosevelt was president.
"Don't tell me your vote doesn't matter ... and if you thought elections don't matter, I hope these last two years have corrected that impression", Obama said. "Just a glance at recent headlines should tell you that this moment really is different", he added. That's not how things are supposed to work.
When Obama stood in front of the IL crowd on Friday and went after Trump by name, then called on young people to vote in November to "restore some semblance of sanity to our politics", Republicans felt like he was talking to their base too.
Mr Obama also poked fun on the issue the current president frequently heralds as one of his greatest achievements - the strong economy.
Leslie Moonves out at CBS after new allegations made public, network says
The company was silent on the terms of a possible settlement with Moonves, who had been negotiating a $ 100 million exit package . CBS said on Sunday it takes such allegations very seriously. "We believe them", Times' Up said in a statement on Sunday.
During his speech, Obama highlighted the seven Democratic candidates now running in the region and in highly contested counties.
The former president also criticized the claims of an anonymous New York Times op-ed, which said many staffers are "working diligently from within" to keep Trump from enacting damaging policies. "He is just capitalizing on resentment that politicians have been fanning for years", the former President said. "But what they understood is, the stakes are high in this election".
Meanwhile, a string of Mr Trump's most senior cabinet members have denied responsibility for the explosive account of how his own team was trying to frustrate the USA president's wishes. "I found he's very good - very good for sleeping", he said.
Obama also reminded voters that the economic recovery - one of Trump's favorite talking points - began on his watch. Obama was "a lot lower key than yesterday's speech". "It's radical. It's a vision that says our protection of our power is all that matters", Obama said.
Then president Barack Obama and first lady Michelle Obama pose with then president-elect Donald Trump and his wife Melania at the White House in Washington, Friday, Jan. 20, 2017.
Vice President Mike Pence acknowledged old President Barack Obama's criticism would procedure a honest distinction between Democrats and Republicans within the advertising and marketing and marketing campaign. He said it immediately after a description of the Republican Party's party-wide agenda of making voting more hard for marginalized constituencies, rejecting science, or encouraging the Benghazi-birtherism mania that flourished under his watch.