The currently-posted national Republican platform (presumably written during the 2016 election cycle, given the “current adminstration” reference) says this:

“Through Obamacare, the current Administration has promoted the notion of abortion as healthcare. We, however, affirm the dignity of women by protecting the sanctity of human life. Numerous studies have shown that abortion endangers the health and well-being of women, and we stand firmly against it.” [emphasis added]

So, yeah, Trump’s “group”, stands “firmly against” abortion.

https://gop.com/platform/renewing-american-values/

Trump got elected, in part, because a lot of religious conservatives hoped he would appoint conservative (read anti-abortion) judges to the supreme court. Religious conservatives don't, for the most part, like his obvious loose morals but many are willing to "hold their nose" and vote for anyone who will make it more likely that abortion will banned in the Unites States. I personally know people who have this attitude.

It just happens that conservative judges would overturn Roe vs. Wade, or other rulings, leaving states free to outlaw abortion. So there's a coalition between pro-life people and more sagebrushey sort of conservatives, who like conservative justices for their upholding of the bill of rights and having a universalist outlook.