After postponing an immigration speech he was going to make last week, Donald Trump tweeted he will instead make a speech on the subject this Wednesday in Arizona.The GOP nominee was scheduled to make a speech dealing with immigration on Aug. 25 in Colorado, but delayed the speech after remarks by Trump suggested he was softening his position on deporting the 11 million undocumented immigrants in the United States.Trump implied last week that immigrants could eventually be allowed to return to the country, saying, “When they come back in, if they come back in, then they can start paying taxes, but there is no path to legalization unless they leave the country and come back.” The Sunday morning talk shows were heavy on discussion of Trump's immigration policies, with vice presidential nominee Mike Pence and others promising on Trump's behalf that would soon make this policies crystal clear.Since announcing his campaign, Trump has made immigration a central aspect of it — going as far as to say he was the reason the issue became relevant in this campaign season.