Pecker is a key witness in the case against the former US president, who is accused of falsifying business records to cover up hush-money payment
He spoke at the Florida headquarters of US Central Command, which oversees US forces in the Middle East, a day after the US said it was sending another 1,000 troops to the region in response to what it called hostile behavior by Tehran.
That deployment should "convince the Islamic government of Iran that we are serious and to deter them from further aggression in the region," Pompeo said.
The United States has blamed Iran for last week's attacks on two tankers in the Gulf of Oman, an accusation Tehran denies as baseless.
The Pentagon released new images on Monday that it said showed Iran was behind the attack on one of the ships.
Last month four ships including three oil tankers were attacked off the UAE. The US blamed Iran, which denied responsibility.
In May of last year Trump withdrew the US from the multiparty accord under which Iran agreed to curtail its nuclear program in exchange for sanctions relief.
Trump reinstated tough economic sanctions in an effort to force Iran to negotiate a new agreement.
Pompeo said Tuesday this campaign of maximum pressure is proving to be "very effective," although other countries fear the heightened tensions could lead to armed conflict.
Pecker is a key witness in the case against the former US president, who is accused of falsifying business records to cover up hush-money payment
The oil and gas conglomerate and Fifa, the world governing body, sign major sponsorship agreement
Toomaj Salehi risks being hanged after the conviction on the Shariah charge of "corruption on Earth" by a Revolutionary Court
Aid groups warn any invasion would add to already-catastrophic conditions for Gaza's 2.4 million people
The American they will face Australia and Serbia on July 15 and July 17 as part of their preparation for the Paris Olympic Games
The leaders emphasise that the deal to release the hostages would bring an immediate and prolonged ceasefire in Gaza
Dubai-based Sumit Augustine has had a philosophical approach towards spending
The regional upswing also defies oil production cutbacks