From the Detroit News:
Reigning Indy Racing League champion Sam Hornish Jr., fresh off a fourth-place finish at the Indianapolis 500, was the fastest among 18 drivers during an ARCA test Tuesday at Michigan International Speedway.Note there is no ICS race the weekend of June 15th.
Hornish, the Penske Racing driver who has been running a limited NASCAR Busch schedule, hopes to compete in the ARCA race June 15 at MIS during the NASCAR Nextel Cup weekend.
Also note Uncle Sam has yet to win an ICS race this year. Coincidence?