The new frontrunner in the GOP primary to replace Paul Ryan is back in the driver's seat. 

Bryan Steil, who announced his run over the weekend, is an attorney and a member of the University of Wisconsin Board of Regents who has been active in GOP politics in the district. But he's also got a connection to the departing speaker of the House; he was his personal driver from 2003-2004. 

Democrats are enthusiastic about their leading candidate, ironworker and Army vet Randy Bryce (often referred to by his twitter moniker @Ironstache.) Bryce, who's posted impressive fundraising hauls, outraised Ryan in the last quarter. Schoolteacher Cathy Myers is also running. 

The district has been a competitive battleground. In 2008, Obama won it, 51 percent to 48 percent. In 2012, with Ryan on the ticket, Mitt Romney won it by just five points, 52 percent to Obama’s 47 percent.

In 2016, the margin for Trump was 10 points; 52 percent to Clinton’s 42 percent. 

The primary is August 14.