Here are five things to watch for when Kamala Harris and Donald Trump meet in Philadelphia at 9 p.m.

Who will look most like a president?

The spotlight will be on Harris in particular, as Trump is better known to voters. The former president will still be under scrutiny, as he has struggled to adjust to his new rival, relying on personal attacks on the vice president.

Who will define Harris?

Both candidates will be trying to achieve a simple goal during the debate: define Harris for a voting public that knows far less about her than it does about Trump.

Will Prosecutor Harris Go After Trump, the Criminal?

Harris has made her experience as a prosecutor a central part of her political identity and has been more willing than Biden to take on Trump during the campaign over his convictions.

Whose economic vision will resonate?

Harris and Trump will lay out their competing economic visions for how to lower the country’s high cost of living. Trump wants to cut taxes, extending the 2017 budget cuts, boost energy production, slash government spending and enlist Elon Musk to pursue aggressive deregulation. Harris wants to raise taxes on wealthy individuals and large corporations to expand the social safety net and provide tax breaks for child care and small businesses.

Who will be stronger on the issues of immigration and abortion?

Trump is on the defensive on abortion rights and is struggling to define his position. Harris, a vocal advocate for reproductive rights, will attempt to link the former president to the Supreme Court’s 2022 overturning of Roe v. Wade. The ex-president will attempt to undermine the Biden administration for a surge of migrants across the U.S.-Mexico border on his watch.

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