The republicans will go further to the right, and obstruct the government more. Only a small subsection of people (like 13 percent) voted in this primary. Brat leans very far to the right, much further then the majority of the population in general. So, this could be a bad thing for the republicans in the long run if they take this as a sign that this is what people really want.
As most of you probably know, late Tuesday night, Eric Cantor, the House majority leader, was unseated by a little known challenger, Dave Brat. Already, he has resigned his post and the Republican House leadership is struggling to replace him. This has thrown Republican leadership in general into chaos and Republicans are losing ground in many districts and states, even Senate Minority Leader Mitch McConnell's home of Kentucky. But to see what this means, we need to look at why Eric Cantor was unseated. The main reason appears to be that Cantor was out of touch with voters in his district. So, even if this does not destroy the Republican Party by showing that money matters little or by shifting it too far right, it will force congressmen to respond to their constituents' needs and wants.