Sen. Ted Cruz is stepping back into the national spotlight at the Republican National Convention, where his rival, Donald Trump, will be crowned the presidential nominee. Cruz’s speech will be a pivotal moment for the Republican Party in 2016 — and possibly beyond. The Texas senator is widely expected to make another run for the White House in 2020 if the GOP loses in 2016. Cruz finished second to Trump in the 2016 race, and his allies in Cleveland are already seeking rule changes in the next primary that might help him.