Republican Brad Lager’s campaign for lieutenant governor has raised nearly $1 million in just one week, most of which came from just three donors.

The most recent donation to Lager was reported today: A $250,000 check from St. Joseph-based Herzog Contracting Corp. Last week, retired investor Rex Sinquefield gave Lager $385,000 and Joplin businessman David Humphreys gave him $250,000.

Lager, a state Senator from Savannah, is challenging incumbent Lt. Gov. Peter Kinder in the Aug. 7 Republican primary. Both men reported a little more than $1.1 million cash on hand in their April filings with the Missouri Ethics Commission. The next quarterly reports will be released later this month.

But in donations of $5,000 or more – which must be reported within 48 hours – Lager far outpaced his rival in the last week, raising $922,500 to Kinder’s $40,000.

In addition to being a significant financial boost to Lager’s campaign, Sinquefield and Humphreys’ support also signals a shift away from Kinder from two of the Republican Party's biggest donors. Both were big donors to Kinder last year when he was expected to run for governor.

Lager has also launched a TV-ad campaign across the state slamming Kinder for his repayment of more than $54,000 to the state to cover hotel expenses that coincided with social events.

But the news hasn't been all bad for Kinder. On Friday, he launched a radio ad highlighting the endorsement of radio host and fellow Cape Girardeau-native Rush Limbaugh.

The winner of the August primary will take on one of eight Democrats vying for the party’s nomination. Also facing off with Kinder and Lager is Republican Mike Carter.