As the New Hampshire primary draws near, Senate Republicans are at a crucial juncture, deliberating over the endorsement of former President Donald Trump. This decision is pivotal as Trump’s potential nomination gains momentum, and the window for impactful endorsements narrows. “As the primary unfolds, the political upside of endorsing the president goes down. After Iowa, he’s, in my view, effectively the presumptive nominee,” Sen. J.D. Vance (R-Ohio), an early Trump endorser, told The Hill. The senator highlighted the diminishing value of late endorsements in the current political climate. Fo…