Tuesday, June 8 is one of the biggest days in politics this cycle with primary elections in 11 states: California, Iowa, Maine, Montana, Nevada, New Jersey, North Dakota, South Carolina, South Dakota, Virginia and Arkansas, which hosts a primary runoff. In three of these states–Arkansas, California and Nevada—voters are choosing contenders for crucial seats in the US Senate, and one incumbent is fighting for her job.

Tom Campbell is seen as a moderate Republican, although he’s a Friedmanite conservative on economic issues. But his moderate pose has made him the most acceptable to the general electorate in California among the three candidates in the June GOP Senate primary. Campbell posts the best numbers against Barbara Boxer, basically in a dead heat, [...]