In Washington, Comey’s dismissal caused a political earthquake. In a letter to Comey, published by the White House, Mr Trump said, "It is necessary to find a new FBI leadership that will regain public confidence in its vital law enforcement mission".
Mr Trump added that he had approved Justice Secretary Jeff Sessions's recommendation that Comey "no longer represents effective leadership". Comey's tenure was due to last until September 2023.
Democrats at the Congress denounced the decision, claiming it raised many questions about the Trump administration's ties to Russian interests.
Sen. Shuck Schumer, the leader of Democrats at the Congress, claimed Comey's dismissal was a serious mistake, noting that he had warned Mr Trump of the move in a phone call.
At a press conference on the Capitol, Schumer called for appointing an independent judge for an inquiry into alleged Russian interference in the US election.
Russian President Vladimir Putin was asked about Trump's firing of Comey as he headed to the ice for a hockey game.
“We have nothing to do with that. President Trump is acting in accordance with his competence, in accordance with his law and Constitution," Putin said.
Obama’s anti-Arab legacy
From an Arab perspective, Democratic President Barack Obama left a perplexing legacy for the Arab region. His administration inked a controversial nuclear deal with Iran. It also stayed handcuffed regarding Iranian interference in the Syrian civil war and Iraq.
Under Trump, the Arab region has seen a real change. An April summit between Trump and Saudi Deputy Crown Prince Mohamed bin Salman in Washington helped revive the US-Saudi historic ties. The relations were strongly damaged under the Obama administration.
Also, Trump has shown greater interest in reining in Iranian threats to the region. His first foreign stop later in May will be in Riyadh where talks with King Salman bin Abdel-Aziz and other Arab and Islamic leaders will be held.
Political analysts predict the talks will further besiege Tehran that widely controls the Shia-dominated Iraqi government and flagrantly supports the Assad regime against his own people.
Trump's review of Tehran
Mr Trump has recently stated that “a review of the 2015 nuclear deal with Tehran was necessary”. Senior officials of the Trump administration including secretary of state Rex Tillerson and secretary of defense Jim Mattis have openly accused Iran of sponsoring terrorism worldwide.
In the Syrian crisis, Trump ordered on April 7th a missile airstrike against Assad regime in response to a gas attack that killed more than 100 and wounded more than 500, including women and children, in a village near Aleppo.
Recently a de-escalation deal has been inked between Russia, Iran and Turkey under which four safe zones were established in Syria. Despite not being a party to the deal, the Trump administration has played a major role to force the Russian side change minds about the crisis.
Despite being a US internal affair, Comey’s dismissal has gratified the Arabs as a victory for Mr Trump, who now gains increasing popularity in the Arab region.