Russia has denied those allegations while Trump has repeatedly dismissed the idea of any coordination between his campaign and Russia as a "witch hunt".
It will be the first face-to-face meeting between the two men since Trump took office in January.
The president has "such a big heart" and offered to help how he could, and the media should be praising Trump for his action, said Lewandowski.
The Trump campaign also remains under federal investigation for possible collusion with Russia on the campaign hacks. Last month, Russian officials threatened to treat US-led coalition planes flying in Syria, west of the Euphrates River, as targets after the US shot down a fighter jet belonging Syrian Government. There's a long list of "irritants" the two countries have been discussing. "Modern technologies allow that to be done quite easily".
It's not yet known if Trump will raise the issue of Russia's meddling during the meeting.
"It has been agreed for July 7", top Kremlin aide Yury Ushakov was quoted as saying by Russian news agencies, without giving further details.
But even that effort has stalled.
CNN TV channel, citing sources in the White House, previously reported that over the course of the meeting, the US President plans to focus on discussing the situation in Syria and Ukraine. A Xi-Trump meeting is scheduled to take place as well as a Putin-Trump summit.
Ushakov urged Washington to "free Russia from the need to take retaliatory moves", according to The Associated Press.
Trump is just the latest president to grapple with the complicated U.S. -Russia dynamic.
Putin would almost surely want something in return.
Before the talks started, the Kremlin strongman presented Xi with the Order of St. Andrew the Apostle the First-Called. As a result, Russian officials were not allowed access to their property.
The U.S. sanctions affected the Russian Embassy in Washington, D.C., the Consulate General in San Francisco and compounds in New York and Maryland.
The lack of a unified strategy has left U.S. allies anxious.
Whether its leaders and members realize it, the Republican Party is at risk of becoming the Vladimir Putin-aligned party in the United States.
Moon is scheduled to have a trilateral meeting with Trump and Abe and a bilateral summit with Abe. Meet the bootilicious babes and hot lookalikes from around the world, including Russian model Anastasia Kvitko.