Incumbent U.S. Senator Pete Ricketts dominates trader consensus at 96.6% implied probability to win the Nebraska Republican Senate primary on May 12, driven by his strong incumbency advantage as former governor, superior fundraising with $4.6 million raised and over $1 million cash on hand as of late March, and negligible competition from challengers Todd Knobel, Eric Mortimore, Debb Axtell Schultz, and Mac Stevens, who report no funds. Edward Dunn withdrew, leaving his shares at 1.1%. No polls or major developments in the past 30 days have emerged to challenge this positioning, with early voting underway since April 13. Upsets would require a late-breaking scandal or unforeseen challenger momentum, though historical primary patterns and Ricketts' establishment backing make this unlikely.