Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE is ramping up his efforts in Nevada and South Carolina as he looks to make inroads in two states that pose some of the most difficult challenges to his presidential ambitions.

The former South Bend, Ind., mayor's campaign said on Wednesday that it would double its organizing efforts in Nevada ahead of the state’s caucuses one week from Saturday. In South Carolina, the fourth state to vote in the Democratic nominating contest, his campaign is set to add another 55 staffers across its six field offices.

The staffing announcement came hours after Buttigieg notched a close second-place finish in the New Hampshire Democratic primary, falling to Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) by less than 2 percentage points. He also finished first in the troubled Iowa caucuses last week after securing the lead in the state’s delegate count.

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Buttigieg’s early successes in the nominating contests have given him a burst of momentum nationally. Most polls still show him running behind other top contenders like Sanders and former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE, though the race appears to be tightening.

Nevada and South Carolina, however, pose a different set of challenges for Buttigieg. Both states have high proportions of minority voters, with whom the former South Bend mayor has struggled to gain significant support.

His campaign said on Wednesday that it would increase its digital and television advertising investments in Nevada, and launch a new TV spot in the state highlighting his “Medicare for All Who Want it” plan, which calls for creating a voluntary public health care option.

Buttigieg’s campaign also announced a new endorsement from South Carolina state Rep. J.A. Moore (D).

The moves in South Carolina come as Biden is looking to cement his status as the front-runner in the Palmetto State following worse-than-expected performances in Iowa and New Hampshire. The former vice president has maintained significant support from black voters, who make up more than half of South Carolina’s Democratic primary electorate.

Buttigieg, meanwhile, has struggled to court those voters. A Quinnipiac University national poll released this week showed him with only 4 percent support among black voters. Those voters will play a crucial role in choosing the eventual Democratic presidential nominee.