Story highlights Errol Louis: By bringing on strategist Kellyanne Conway as campaign manager; Trump has boosted his chances

But Louis says association with scandal-plagued Roger Ailes could hurt Trump with women

Errol Louis is the host of "Inside City Hall," a nightly political show on NY1, a New York all-news channel. The opinions expressed in this commentary are solely those of the author.

(CNN) The sudden reorganization of Donald Trump's campaign leadership is a long-overdue acknowledgement that the style and strategy Trump rode to victory in the Republican primary is killing the billionaire's chances of winning the general election in November.

With multiple key political indicators pointing to a defeat -- including sagging poll numbers in swing states, no money spent on television ads and his fellow Republicans' reluctance to endorse him -- a tune-up was in order.

JUST WATCHED Third Trump campaign shake-up in as many months Replay More Videos ... MUST WATCH Third Trump campaign shake-up in as many months 05:12

The most important change is Trump's wise decision to promote a senior advisor, Kellyanne Conway, to the pivotal position of campaign manager. Conway, trained as an attorney, has impeccable credentials as a strategist: She formerly worked with well-known political guru Richard Wirthlin (a top adviser to Ronald Reagan) and with Frank Luntz, a key strategist behind the creation of the Contract with America that helped Republicans capture control of the House of Representatives in 1994.

Steeped in what political pros call analytics -- the art and science of discovering and interpreting the public mood -- Conway branched out on her own as owner of The Polling Company. Earlier this cycle, she served as president of a SuperPac, Keep the Promise I, that helped Sen. Ted Cruz beat Trump in Iowa and other key states.

She is the kind of numbers-cruncher who rarely cites statistics but has a knack for explaining what they mean in plain language, and so is frequent guest on cable television. She even paired up with a Democratic pollster to write a book about the rising cultural and political power of women voters.

Read More