Mark Walker North Carolina politician
He joins 23 other House Republicans who are either retiring or planning to seek another office.
The Republican congressman's latest declaration was different from his tweet, where he said he only "struggled" with the racist chant.
Rep. Mark Walker tweeted about a recent rally for President Donald Trump, where his supporters chanted "Send her back!" about the black Muslim congresswoman.
The BLAKE Act would ban ex-members from lobbying Congress until they repay taxpayer money spent on sex harassment settlements.