By Tim Reid, Nathan Layne and Gabriella Borter DES MOINES, Iowa (Reuters) – Donald Trump secured a resounding win in the first 2024 Republican presidential contest in Iowa on Monday, asserting his command over the party despite facing scores of criminal charges as he seeks an election rematch with President Joe Biden. Trump took over half the votes, propelling him towards what looks set to be a close and deeply acrimonious election campaign against Biden, a Democrat, in November. Florida Governor Ron DeSantis, 45, finished well behind Trump in second place in Iowa, edging out former U.N. Ambas…