The time has finally come: Barack Obama is about to publicly get back into politics.

The former president may have spent the beginning of this year on vacation, but he and his aides are planning his return to the Democratic Party this fall, The Hill reported Friday. And even though many of his efforts will center on fundraising and campaigning for people like Virginia gubernatorial candidate Ralph Northam, experts say Obama needs to be careful with Donald Trump.

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“He would be the target against which Trump would direct his fury,” Southern Methodist University political science professor Cal Jillson told The Hill. “From Trump’s perspective, nothing better could happen.”

Indeed, Trump is not likely to welcome Obama’s comeback. The current commander in chief can’t stop talking about his predecessor. Earlier this week, after a Washington Post report indicated North Korea was expanding its nuclear capabilities, Trump retweeted a message from former U.S. ambassador John Bolton saying that “our country & civilians are vulnerable today because @BarackObama did not believe in national missile defense. Let’s never forget that.” He also retweeted an…