How did the Iowa result change the Republican primary?

Donald TrumpTV dominated public-opinion polling before the Republican presidential primary in 2023. Yet his rivals could reasonably argue that the party faithful still had not cast any votes, and the actual results might reveal a greater appetite for an alternative than surveys suggested. Mr Trump’s decisive victory in the Iowa caucus on January 15th seems to have put an end to that hopeful theory.Some Republicans had predicted record attendance at Iowa’s caucuses this year, but turnout fell by around 40% from the peak in 2016. No doubt many voters opted to stay at home given the sub-zero temperatures and Mr Trump’s apparent invincibility. But networks also began calling the race for the former president less than an hour after the caucuses began; some caucus-goers were even told that he had won before they had a chance to vote.