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Former South Carolina governor and Rep. Mark Sanford announced Tuesday that he is ending his presidential campaign.
Why it matters: Sanford, a deficit hawk whose opposition to Trump resulted in him losing his House primary in 2018, was always a long shot to unseat the president as the Republican nominee in 2020. Former Massachusetts Gov. Bill Weld and former Illinois Rep. Joe Walsh remain in the race.
Go deeper: Trump's approval rating among Republicans has never dipped below 79%