President Donald Trump faces one of the weightiest decisions of his second term as he orders the largest military buildup in the Middle East in 22 years.

If he decides to go ahead with an attack on Iran, his options range from targeted strikes to sustained operations that could potentially last for weeks.

Some plans include taking out Tehran’s leaders. Many would be on a much larger scale than the hours-long bombing run that targeted Iranian nuclear facilities last summer, according to sources.

People familiar with the plans said the US military could be ready as soon as this weekend to strike Iran, but US officials and regional diplomats involved in talks with Tehran do not expect strikes that soon.

Middle East envoy and Trump’s son-in-law, Jared Kushner, is among the advisers hopeful of reaching a nuclear deal with Iran.

US troops have not yet received a target list for potential strikes, a sign Trump has not yet “pulled the trigger” on any military operation. White House officials say he continues to prefer a diplomatic solution.

Trump has issued vague warnings to Iran to reach a deal, saying he would know within 10 to 15 days whether an agreement is possible.

Military assets for a range of operations are in place or will be soon, including the USS Gerald R.

Ford aircraft carrier, expected in the Eastern Mediterranean by early next week.

Part of the buildup aims to protect US troops from preemptive or retaliatory strikes by Iran.

Options being considered include targeting Iran’s leadership, enrichment capabilities, or ballistic missile program.

White House spokesperson Anna Kelly said Trump has been clear that Iran should make a deal or face consequences.