Of Nunes' constituents polled 49-percent approve of the job he is doing in congress-- 32-percent do not.
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Fresno County GOP Chairman Fred Vanderhoof said the numbers reflect a pushback from Nunes supporters.
"Oh definitely-- the people are standing up. They're backing him up and they're seeing all the heat he's taking nationally."
An Action News poll conducted a week ago among all Valley residents showed more people-- 42-percent approve to 40-percent disapproved of the job Nunes was doing.
The 22nd Congressional District spans from Clovis to Tulare-- Republicans hold a 10-percent edge in voter registration.
Fresno Democratic Congressman Jim Costa believes the investigation into whether Russia meddled in the presidential election has hurt Nunes' credibility.
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"Well I wouldn't have handled it the way he did. The fact of the matter is there now is a sense of lack of credibility in whether or not the House Intelligence Committee can do its job."
The poll showed Nunes' 50-percent constituents approve his handling of the investigation to 35-percent disapproval.
"The truth will come out eventually and I think Devin Nunes is on the side of the truth and we'll just have to wait a little bit longer," said Vanderhoof.
Most of Nunes' constituents, 48-percent, believe he should remain as chair of the House Intelligence Committee, 34-percent do not.
The poll numbers do not come as a big surprise-- Congressman Nunes won re-election in November with 68-percent of the vote.