I'm not sure I'd say that got traction in the sense of creating a national political moment. People who hate Trump got really mad about it but it didn't seem to be taken by the mainstream media as clear proof of collusion and Republicans barely even seemed "troubled".Uhh, no.
I mean, obviously the cover up is additional crimes so without it, things wouldn't be worse... But of course it would have gained traction had Trump gone on TV and told Ukraine they had to investigate Biden, days after he froze their already approved aid.
His 'Russia if you are listening' comments got plenty of traction.
Especially with that precedent surely he could have just said "Ukraine if you're listening..." on national TV and it would barely have caused a stir.
Edit: And that was even during the campaign when Republicans thought they wouldn't have to suck up to him for four years.