Venezuelan opposition leader Juan Guaido says he's returning to the country to attend protest marches.
But the man who's challenging the rule of President Nicholas Maduro may be arrested if he returns.
Guaido is being supported by the United States in asserting his status as the interim president of Venezuela.
Ambassador John Bolton, US President Donald Trump's National Security Advisor has warned that "any threats or acts against his safe return will be met with a strong and significant response from the United States and the international community".
Speaking on CNN's State of the Union, Bolton says he's seeking international support.

UN Chief warns two-state solution slipping away amid West Bank expansion
Pakistan sends helicopters, drones to end desert standoff; 58 dead
Saif al-Islam Gaddafi, son of late Libyan leader, shot dead
Sudanese army says it's broken siege of famine-stricken Kadugli
WHO says first five patients evacuated via Gaza's Rafah crossing