Adam Thomas, 22, and Claudia Patatas, 38 are on trial for being part of banned neo-Nazi group National Action.
Tom Brake, a Liberal Democrat MP, said that "I would suspect every single MP has received this abuse."
Hope Not Hate proposed legal proceedings over comments the former UKIP leader made in a radio interview.
The mother of two was shot and stabbed one week before the EU referendum.
Israel's intelligence agency is providing free lessons aimed at protecting politicians against stalkers and extremists.
Cox died on June 16 after being shot and stabbed outside a library in her constituency.
Thomas Mair, 52, is accused of shooting and stabbing Cox in the street.
Two planes carrying a 'Vote Leave' banner were spotted over a memorial rally for deceased MP Jo Cox.
A moment of silence will take place at 4.25 p.m.
Brendan Cox spoke about his late wife Tuesday evening.
Combating domestic extremism in the U.K. is the responsibility of the police.
The fund's organizers will divide the money between three charities Cox supported.
The number of firearms offenses has fallen from a high of 24,094 in 2004 to 7,866 in 2015.
She had also recorded a video about preventing Islamophobia.
Anti-racism campaigner Nick Lowles feels both pain and anger at Cox's death.
Witnesses said a man shot at Cox with what looked like an "old" or "makeshift" gun.
David Cameron and Jeremy Corbyn paid tribute to Cox in Birstall on Friday.