After a slow July, we are happy to report that voters are back voting!

Today, Missouri, Kansas, Washington state and Michigan all hold primaries. (Make sure to read Sean Sullivan's preview of the contests here.)

The marquee race is in Kansas where Sen. Pat Roberts faces radiologist Milton Wolf in a contested Republican primary. The incumbent is favored but after the upset of Rep. Eric Cantor (R-Va.) earlier this summer, there's a newfound leeriness about primary polling. And rightly so.

Any time voters are voting, we like to offer a Fix readers a chance to predict what's going to happen.  At stake? A brand spanking new Fix "Politics and Pints" shirt.

P and P shirt

Want one? Of course you do. Here's what you need to do.  Put your predictions -- with percentages! -- of how the Roberts-Wolf primary will end up. All predictions must be made in the comments section below by 8 pm eastern time.