Mainstream G.O.P. Group to Target Bob Good as It Shifts Mission and Members

The Republican Main Street Partnership, a group that supports center-leaning House Republicans, plans to direct half a million dollars into a bid to defeat Representative Bob Good, a hard-right lawmaker from Virginia, making an unusual push to oust a sitting Republican member of Congress.

The move is notable not just because the group, through its campaign giving arm, is inserting itself into the kind of intramural fight against an incumbent…