President Obama plans to detail what executive actions he will take in a televised address to the nation tonight.
The president is widely expected to provide at least temporary relief to some of the 12 million immigrants who are in the country illegally.
Some Republicans worry the president's actions could spark civil disobedience or even violence and they accuse the president of ruining chances for comprehensive reform.
Some undocumented immigrants in the Chicago area are relieved to learn President Obama is taking action on the divisive issue and are hoping it will allow them to stop living in fear.
Obama's opponents say the president is going too far.
The President's plan to bypass Congress is a controversial move that has riled Republican leaders who say Obama is overstepping his constitutional bounds. It's also come under fire from those who want a more extensive overhaul and drawn swift opposition from critics who call it an unfair amnesty that rewards lawbreakers.
Even among the millions of people who could be directly impacted by whatever Obama says, reactions are already mixed.
Some are excited, some are skeptical, some are anxious and some are angry. One thing is clear: When Obama speaks in a highly anticipated address Thursday night, they'll be listening.