Of course, it's not a matter of black letter law. But assuming a partisan situation, Democrats are unlikely to try and impeach another president for similar behavior, because they know the Republicans won't assist. (And if the Republicans do assist, it will make this impeachment look worse for them.) Any Republican trying to impeach a president for similar behavior will know the Democrats can simply quote their own words back at them, and will know that the Republicans are being grossly hypocritical. If the Republicans did have the power to force it through, it's going to get ugly, since that's clearly stating that impeachment is not about "high crimes", it's about who has the power.
(There is a note that Senate Majority Leader Mitch McConnell did have his words quoted back at him; it's also worth noting that he's polling quite a bit worse than the partisan lean of his state, Kentucky, especially surprising for a long-term Congressional member with power in Congress.)
Congress could pass laws against similar "quid pro quo", and then try and enforce those laws through impeachment, like was done against Johnson. But until if and when they do so, it's hard to imagine that something like this could be used for impeachment.