On the Republican side, Donald J. Trump is the clear choice among voters (other than those in Senator Ted Cruz’s home state, Texas) who say that immigration is the most important issue of the election. He is also generally favored by those who believe the economy, terrorism and government spending are most critical.

Mr. Trump’s supporters want the 2016 Republican nominee to be an outsider. They also tend to be angry about the federal government, feel betrayed by Republican politicians and worry about the economy.

Mr. Trump does well with voters who want a candidate who “tells it like it is” and can bring change. He is generally favored by people who believe electability is important, but loses to Mr. Cruz among voters who want someone whoshares their values.

On the Democratic side, Hillary Clinton attracts voters who think health care, the economy and terrorism are the most important issues. Senator Bernie Sanders’s voters are more likely to care about income inequality.

Mrs. Clinton is overwhelmingly favored by people who say experience is the most important quality for the next president. She is also viewed as more electable. Voters who value honesty and trustworthiness tend to side with Mr. Sanders instead.