There is quite a difference between. exaggeration and blunt lies.

Also most exaggeration happens during campaigns for getting votes, but rarely the result is a strong enough mandate to push all things through, thus one has to compromise ... but campaigning on "well, realistically my options will be limited" doesn't really work, especially as the campaign promises form the negotiation base lateron.

But in that regard Trump is special, also.

What you point to is an odd reversal for sure. Trump is actually doing many of the things he campaigned on while most candidates lie during the campaign. Trump now lies about seemingly obvious or unimportant things now in office, where many presidents either wouldn't waste a lie on something unimportant or wouldn't bother acknowledging the topic at all.

They all still lie though. Whether a particular lie can be considered an exaggeration boils down to how strict a line one draws around what a lie is. To me, if a president speaks only a partial truth or a misrepresentation if information they very much have access to, its a lie.