The top Republican and Democrat on the Senate Judiciary Committee say President Donald Trump's son-in-law hasn't been fully forthcoming with the panel's probe into Russian election interference, asking him to provide emails sent to him involving WikiLeaks and a "Russian backdoor overture and dinner invite." Senate Judiciary Chairman Chuck Grassley and Democratic Sen. Dianne Feinstein sent a letter to Jared Kushner's lawyer Thursday saying the collection of documents he has provided the committee is "incomplete." The committee gave Kushner a Nov. 27 deadline to provide the additional documents, including the forwarded emails and Kushner's security clearance form that originally omitted certain contacts with Russian officials. Grassley and Feinstein are also asking Kushner for correspondence with former national security adviser Michael Flynn, who is a subject of an investigation by special counsel Robert Mueller. The senators noted they have received documents from other campaign officials that were copied to or forwarded to Kushner, but which he did not produce. Those include "September 2016 email communications to Mr. Kushner concerning WikiLeaks." Trump's eldest son, Donald Trump Jr., corresponded with WikiLeaks that month and, according to The Atlantic, sent an email to several Trump campaign advisers to tell them about it. Grassley and Feinstein also wrote that other parties have produced documents concerning a "Russian backdoor overture and dinner invite" that Kushner forwarded but has not given to the committee. It is unclear what overture and dinner invite they are referring to. In the letter to Abbe Lowell, Kushner's lawyer, Grassley and Feinstein wrote they "appreciate your voluntary cooperation with the committee's investigation, but the production appears to have been incomplete." Lowell said in a statement that Kushner has been responsive to all requests. Jared Kushner sits behind Donald Trump at the White House, Nov. 1. KEVIN LAMARQUE / Reuters "We provided the Judiciary Committee with all relevant documents that had to do with Mr. Kushner's calls, contacts or meetings with Russians during the campaign and transition, which was the request," Lowell