Washington Post- University of Maryland poll - 2018 Maryland governor's election - October 4-7, 2018
Maryland Today- Sarah Gavin, "Post-UMD Poll: Hogan Expands Lead in Governor's Race", Maryland Today, October 10, 2018.
The Washington Post- Erin Cox, Emily Guskin, and Ovetta Wiggins, "Gov. Larry Hogan leads Democrat Ben Jealous by 20 points, Post-U. Md poll finds", The Washington Post, October 9, 2018.