Reuters photographer dismissed after White House dispute
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Veteran Reuters photographer Jonathan Ernst fired after nearly 20 years over dispute with White House aides while setting up for Biden address
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Ernst allegedly had heated argument after being asked to leave Oval Office ahead of address; pushed back as he had already set up equipment
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White House launched investigation into Ernst's behavior over incident; Reuters then dismissed him after multi-week review
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Reuters union chair demanded Ernst's firing be rescinded, said he didn't threaten anyone or use inappropriate language
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Some speculate Ernst had made enemies at Reuters looking for ways to force him out; has reputation for short fuse when work obstructed