They've grilled his cabinet positions on all sorts of critical issues, from climate change, ties with Russia, sketchy investments, whether disabled students have a right to education, if Putin is a war criminal, etc..
I don't think abortion is at the heart of any of these questions. ..my guess is because Trump, like many other politicians on the right, know abortion brings reluctant Republicans into the tent, who, if abortion was ever legalized, would be free to vote Democrat.
My mother for instance, will vote for a pro life Republican even if she agrees with the opposition candidate on every other issue, because she feels it is her duty. If a Republican president and Congress outlawed abortion. it would free her up to vote on other issues. So I suspect they won't. ..when Bush had a majority, nothing happened.
And now, at the end of Obama's presidency, we have hit a new low in abortions, that's positive news.