I don't think the Senate are permitting him to be President though. Rather they aren't getting rid of him and while that may seem Jesuitical, it's an important difference. The idea that simply because the House of Representatives has passed an impeachment means that the Senate not doung so is somehow a permission would be a reversal of the burden of proof, and would challenge the checks and balances in the US constitution.
There is obviously a problem with the party politicization of auch issues but that also then applies to the House of Representatives.
There are only three ways to remove Trump: The first is for the Senate to follow through on the House's articles of Impeachment and have him removed from office. They refused to even hold a trial after the House's impeachment, which is unprecedented. Second is for either the Senate or the Vice President to invoke Article 25 of the Constitution. But, there again, regardless of how egregious or dangerous Trump's behavior, no one in the GOP will act. The third, of course, is to vote him out, which doesn't happen until November. My concern is over what damage he will do between the election and the inauguration if he loses. I'm praying that some of those around him, who obviously see Trump the way Bolton does, might then have him removed.