Dr. Robert Derlet collects water samples at Putah Creek near Davis to check for algae and bacteria in this 2010 file photo. On Monday, Derlet, a Democrat, announced he was running for Congress against Rep. Tom McClintock, R-Elk Grove.
Dr. Robert Derlet collects water samples at Putah Creek near Davis to check for algae and bacteria in this 2010 file photo. On Monday, Derlet, a Democrat, announced he was running for Congress against Rep. Tom McClintock, R-Elk Grove. Manny Crisostomo mcrisostomo@sacbee.com
Dr. Robert Derlet collects water samples at Putah Creek near Davis to check for algae and bacteria in this 2010 file photo. On Monday, Derlet, a Democrat, announced he was running for Congress against Rep. Tom McClintock, R-Elk Grove. Manny Crisostomo mcrisostomo@sacbee.com

Democrat Bob Derlet, doctor and environmentalist, challenging Rep. Tom McClintock

February 22, 2016 03:30 PM

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