More than 22,000 police and security agents are set to put the city on lockdown, with 33 protests against the summit planned.
The material reportedly encouraged violent jihad against nonbelievers and urged the death penalty for women who have an affair.
"We do know of course he has openly bragged about how many millions he makes from Saudi Arabia," the California Democrat pointed out. "Is his personal financial interest driving U.S. policy in the gulf?" he asked.
"The expectation that Trump as president will be starkly different from Trump as candidate is a false hope at best," Jamal Khashoggi wrote in 2016.
Iran's Foreign Minister Javad Zarif tweeted that his country gets blamed for any problem the president can think of.
Despite Trump's continued support of the Saudi prince, leading Republican and Democratic lawmakers have taken a markedly different position.
The crown prince has threatened to develop nuclear weapons if Iran is able to do the same.
Images of the crown prince meeting with Khashoggi's son and shaking his hand have been circulated online.
The chancellor said there was an "urgent need for further clarification" of the circumstances surrounding Jamal Khashoggi's killing.
"You don't bring a bone saw to an accidental fistfight," Senator Ben Sasse said Sunday.
"The Democrats seriously believe they have a way of blaming Donald Trump for this," Limbaugh said.
Kushner reportedly also likened Khashoggi's death to Saudis kidnapping the prime minister of Lebanon.
"Every single thing he promised me he delivered 150 percent on," Kushner said of Saudi Crown Prince Mohammed bin Salman.
The top diplomat had been dispatched by President Donald Trump to Saudi Arabia in the wake of dissident journalist Jamal Khashoggi's alleged murder.
Prince Khalid, accompanied by Saudi Foreign Minister Adel al-Jubeir, met Secretary of State Mike Pompeo upon arrival in Riyadh on Tuesday.
"We believe that the murder was premeditated and the body was subsequently moved out of the consulate," a Turkish official said.
The man was detained on charges of "committing several violations and taking up a post exclusively reserved for Saudis."
"Content that ridicules, mocks, provokes and disrupts public order, religious values and public morals" will be punished, the public prosecutor warned.
Mohammed bin Salman's bold declarations of modernization have won over the West. Has he snowed us all?
The 29-year-old has been detained since 2015 for involvement in anti-government protests.
The kingdom executed 146 people last year, the third highest figure of any country.
The deal would address the future of Assad, Iran's place in Syria - and Syria's relations with Israel.