President Donald Trump confirmed Wednesday that he has authorized the CIA to conduct covert operations inside Venezuela and said he was weighing carrying out land operations on the country.

The acknowledgement of covert action in Venezuela by the U.S. spy agency comes after the U.S. military in recent weeks has carried out a series of deadly strikes against alleged drug-smuggling boats in the Caribbean. U.S. forces have destroyed at least five boats since early September, killing 27 people, and four of those vessels originated from Venezuela.

The move has spurred anger in Congress from members of both major political parties that Trump was effectively committing an act of war without seeking congressional authorization.

On Wednesday, Sen. Jeanne Shaheen, the ranking Democrat on the Senate Foreign Relations Committee, said while she supports cracking down on trafficking, the administration has gone too far.

“The Trump administration’s authorization of covert C.I.A. action, conducting lethal strikes on boats and hinting at land operations in Venezuela slides the United States closer to outright conflict with no transparency, oversight or apparent guardrails,” Shaheen said. “The American people deserve to know if the administration is leading the U.S. into another conflict, putting servicemembers at risk or pursuing a regime-change operation.”

The Trump administration has yet to provide underlying evidence to lawmakers proving that the boats targeted by the U.S. military were in fact carrying narcotics, according to two U.S. officials familiar with the matter.

The officials, who were not authorized to comment publicly and spoke on the condition of anonymity, said the administration has only pointed to unclassified video clips of the strikes posted on social media by Trump and Defense Secretary Pete Hegseth and has yet to produce “hard evidence” that the vessels were carrying drugs.

Lawmakers have expressed frustration that the administration is offering little detail about how it came to decide the U.S. is in armed conflict with cartels or which criminal organizations it claims are “unlawful combatants.”

Even as the U.S. military has carried out strikes on some vessels, the U.S. Coast Guard has continued with its typical practice of stopping boats and seizing drugs.

Trump on Wednesday explained away the action, saying the traditional approach hasn’t worked.