I don’t understand this story at all. Michels is the pro-life candidate in that race. Why is he upset by this? He should be proud of his donations to pro-life groups. He puts his money where is mouth is. Instead he is whining about it. How he is acting make it look as if he believes being pro-life is a political liability.
Is he whining about it? The article did say:
"Michels defended his giving to pregnancy resource centers, Wisconsin Right to Life and Pro Life Wisconsin, saying “we believe women who may feel overwhelmed by an unplanned pregnancy need and deserve compassion, love, support and options other than abortion.
“I apologize for none of it,” Michels wrote."
That said, as someone who lives in Wisconsin and is thus seeing ads, pretty much all of the anti-Michels ads I'm seeing are focusing on his abortion positions as being too extreme. Since that seems to be their go-to attack on him (in fact, I haven't seen any attack ad that attacks him for anything other than that), I can see why he might want to try to play that down a bit.
It's actually rather surprising to me that Michels won the primary. The only real achievement that Michels can point to in politics is the fact he won the Republican primary for Senator back in 2004 (he tried in 1998 as well but lost that time). But then he got stomped in the main election, 55% to 44%. For comparison, remember that while Bush did lose Wisconsin in 2004, he only did so barely (49.7% to 49.3%). So it's not like you were guaranteed to lose as a Republican. After that, Michels basically disappeared from politics until this year, when he abruptly entered the governor election.
Michels did get the Trump endorsement which is obviously a big deal, but probably the reason he won was the fact he went really, really hard on ads. His main competition was Rebecca Kleefisch (former Lieutenant Governor), and I barely saw any ads from her, which was surprising to me--even if Michels had more money (he's fairly wealthy and thus could self-fund his stuff), she still didn't seem to be hard up on donations from what I could tell. Maybe she was focusing her ads elsewhere in the state, but the difference was very noticeable. Michels also made absolutely sure to stress his Trump endorsement in his ads, whereas I don't recall Kleefisch making note of endorsements in her ads (she got endorsements from reasonably high profile people like Mike Pence, Ted Cruz, Nikki Haley, Sarah Sanders, and former Wisconsin Governor Scott Walker). Granted, maybe I'm misremembering things due to there being so few ads for her I saw.