Murphy is the establishment favorite to take on Sen. Marco Rubio.
Sens. Pat Toomey, Marco Rubio and Rob Portman all hold significant leads.
He gains 2 points against the vulnerable Republican senator when the libertarian candidate is included.
Bayh, who served 12 years in the Senate, will seek to replace the retiring Dan Coates.
Timothy Cama 07/12/16 04:22 PM EDT
Green groups are trying to help Dem Katie McGinty unseat Sen. Pat Toomey (R).
Rep. Alan Grayson wanted to mark one month since the Orlando shooting.
Patty Judge’s quest will likely be the toughest fight of her political career.
The protesters are urging Rubio to support tougher gun control measures.
Rep. Ann Kirkpatrick raised more than $1.8 million in the second quarter of this year.
His entry into the Indiana race represents a major recruiting win for the Democrats.