One day after announcing his plan to step down as Starbucks' executive chairman, Howard Schultz didn't rule out a possible presidential run during an interview with CNBC on Tuesday morning.

The big picture: Though Schultz was coy about his future plans, he did lay out his views on a few hot-button issues, highlighting his political opposition to President Trump.

• On immigration: Schultz said the country's current immigration policy isn't "very humane," adding that border security is not the United States' biggest immigration problem.
• On trade: Schultz said he doesn't understand the Trump administration's stance on trade, especially concerning China: "Our problem is not China."
• On the economy: Schultz said that he believes the country should focus on its $21 trillion debt problem and $400 billion in interest: "These are things that are unsustainable."
• On Trump's tax cuts: Corporations didn't need a 21% tax cut, according to Schultz. "We could've done so much more for people in this country."

Flashback: Schultz has been considered a possible challenger to Trump for some time now — and was similarly non-commital when asked about his presidential ambitions last year.