Pakistan, Jan. 13 -- Opposition is growing in the US Congress to any potential military action against Iran, with lawmakers warning that such intervention could backfire and would violate the Constitution.

Read More: US senate blocks bid to limit Trump's Iran war powers

Senior Democrats and Republicans alike have questioned the Trump administration's threats of military action amid widespread protests in Iran over economic hardship and calls for regime change. Lawmakers cautioned that using force to support protesters could undermine the very movement the US intends to help.

Republican Senator Rand Paul and Representatives Thomas Massie and Marjorie Taylor Greene emphasised that the United States should focus on domestic priorities rat...