President Donald Trump suggested his coming Supreme Court pick could trigger decisions that would make abortion illegal in some states, and said Republicans want to pass more tax cuts aimed at the middle class just weeks before voters will decide which party controls the House and Senate.

As an increasing number of congressional Democrats, including some expected 2020 presidential candidates, call for the U.S. Immigration and Customs Enforcement agency to be abolished or substantially overhauled, Trump made clear he intends to make that a major midterm campaign issue.

Asked by Fox News in an interview that aired Sunday morning if he will ask Supreme Court nominee candidates their views on landmark abortion case Roe v. Wade, Trump replied: “Probably not.” But he said he will be “putting conservative people” on the high court during his presidency, and said abortion rights “very well could end up” being decided on a state-by-state basis “at some point.”

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But Susan Collins of Maine, a moderate GOP senator whose vote could make or break the coming nomination, said Sunday she would not support any nominee who voices an intention to take down the Roe v. Wade decision.