Producer-Director J.J. Abrams is one of the stars expected at Obama's events.
Rep. Murphy says Rep. Grayson is unfit for public office.
Obama called Duckworth a "champion for her fellow veterans."
The GOP senator believes the court seat should remain empty until next year.
Alan Grayson says his Senate primary opponent is fueling a smear campaign.
She had been snubbed in February by the Congressional Black Caucus PAC.
The primary winner will take on Republican Pat Toomey for his spot in the Senate.
The largest federal employee union is throwing its support behind the congressman.
Kirk said he was "leading by example" by meeting with Merrick Garland.