The Club for Growth PAC is extending its buy of on-air television ads against Democrat Frank Kratovil beyond the initial  $100,000 ad campaign they launched earlier this month.

Kratovil, the Queen Anne's County state Attorney, is currently running against state Sen. Andy Harris (R-Cockeysville) for the open 1st Congressional District seat. The Club for Growth has championed Harris since the primaries, sending millions of dollars his way. Kratovil has called the Club for Growth an extreme conservative economic group.

Nachama Soloveichik, communications director for the group, says they have put a lot into the race since the primary and want "to make sure Harris crosses the finish." She says her organization hasn't done any polling, but that the race "looks competitive."

The $100,000 ad buy will run on broadcast television in the Baltimore and Salisbury media markets, according to the Club for Growth PAC.