Ahead of President Donald Trump’s visit to Nevada on Thursday, outside Republican groups are ramping up their spending in the 3rd District to help GOP nominee Danny Tarkanian in one of the party’s few pickup opportunities.

The Congressional Leadership Fund, a super PAC aligned with House GOP leadership, made a new ad reservation in the district in the Las Vegas media market that starts Thursday, according to a source with knowledge of the media buy. CLF spokeswoman Courtney Alexander confirmed the $2.5 million reservation to Roll Call.

CLF’s buy was not timed around Trump’s visit, but another group did link the president’s upcoming rally in Las Vegas to its increased spending in the race.

America First Action, a pro-Trump super PAC, announced in a press release Wednesday that it was reserving $1.5 million worth of airtime in the district, which is situated south of Las Vegas.

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