Trump, Pence jockeying for influence within the GOP

Former Vice President Mike Pence is becoming increasingly forward in his willingness to counter former President Donald Trump.

The two held dueling events in Arizona on Friday as rival candidates who offer dramatically different visions of the Republican Party in a critical battleground state. Days later, they will once again cross paths as they deliver major speeches on the same day in Washington, D.C.

The encounters mark a more confrontational phase in the fraught relationship between the former running mates. Once close confidantes, Trump and Pence could soon find themselves competing against one another in...