Illinois Republicans on Tuesday chose conservative state Sen. Darren Bailey to take on Gov. J.B. Pritzker, a billionaire who easily won the Democratic nomination and who spent millions trying to get the rival he wants and increase his already sizable advantage in the state this fall.Bailey, who defeated five other Republicans to win the nomination, is a farmer and staunch abortion opponent who received former President Donald Trump’s endorsement Saturday.Pritzker immediately framed the race as a referendum on the …