Sen. Lindsey Graham (R-S.C.) defended his move to investigate Joe Biden and his son, days after the former vice president said he was disappointed and angered by his old friend.

“I love Joe Biden as a person but we are not going to give a pass to what is obviously a conflict of interest,” Graham tweeted Monday, claiming Hunter Biden’s past position on the board of Burisma Holdings, a Ukrainian energy firm, “doesn’t pass the smell test.”

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