President Nicolas Maduro was seeking special decree powers from Venezuela's parliament on Tuesday in response to new US sanctions, drawing opposition protests of a power-grab.

If as expected the government-controlled National Assembly approves his request for an "Enabling Law", it would be the second time the 52-year-old successor to Hugo Chavez has gained these expanded powers since winning election in 2013.

‘I'm going to ask for an anti-imperialist Enabling Law ... to preserve the nation's peace, integrity and sovereignty,’ Maduro said in a speech late on Monday night.

Opposition leaders slammed Maduro, saying he was using the worst flare-up with Washington of his nearly two-year rule to justify autocratic governance, sidetrack parliament and distract attention from Venezuela's grave economic crisis.

‘Nicolas, are you requesting the Enabling Law to make soap, nappies and medicines appear, to lower inflation?’ satirized opposition leader Henrique Capriles. ‘It's another smokescreen.’

Confirming Venezuela as Washington's No. 1 adversary in Latin America after a rapprochement with Cuba, the United States has taken its gloves off against Maduro, qualifying his government a security threat and sanctioning seven officials.

In terminology that has also been used for measures against nations like Iran and Syria, President Barack Obama's government declared a "national emergency" due to "the unusual and extraordinary threat" from Venezuela.

VISA BAN

A visa ban and financial block was slapped on seven officials, ranging from the head of national intelligence and a state prosecutor to the national police chief and various military officers, for their alleged role in repressing Maduro's domestic opponents or corruption.

Alongside the seven on national TV late on Monday, Maduro hailed them as "heroes" and named one interior minister.

Despite improving ties with Washington, communist-run Cuba was quick to join Venezuela's mockery of the U.S. language.

‘Venezuela a threat to the United States? Thousands of miles away, without strategic arms and without using resources or officials to conspire against the U.S. constitutional order, the declaration is barely credible and reveals the real aims of those behind it,’ Cuba's government said in a statement.

Despite the diplomatic tensions, the United States is Venezuela's top trading partner and the OPEC member's crude sales even rose in February to 796,000 barrels per day.

Venezuela's heavily traded bonds have slipped amid the dispute, with most down on Tuesday. The benchmark 2027 issue VENGLB27=RR was off 2.000 points, or nearly 5 percent, to a bid price of 39.444.

US-Venezuelan tensions have escalated amid since Maduro's accusations that Washington was behind an alleged coup plot and the arrest of an opposition Caracas mayor accused of conspiracy.

Maduro may be calculating that nationalist sentiment will rally strained support among the traditional "Chavista" power-base of Venezuela's poor, and unite ruling Socialist Party factions ahead of a parliamentary election later this year.

Opposition legislator Elias Matta accused the government of using the U.S. spat as an excuse to ask for decree powers they had long planned to request due to fear of losing control of the National Assembly as some pollsters say they might.

‘The government is taking advantage of this situation with the United States ... they'd already planned this,’ he said. ‘But a majority-led assembly can also strike down laws.’