One reason for this is that while Republican voters overwhelmingly consider themselves conservative, only 56% of conservative voters consider themselves to be Republicans. In other words, nearly half of all conservatives nationwide reject the Republican Party label.
This means that Republicans looking to broaden their party’s outreach cannot ignore the need to attract a large number of conservative voters along with some political moderates. Of all the non-Republicans in the nation, 31% consider themselves at least somewhat conservative while 37% say they’re political moderates…
It should be noted that Democratic Party dynamics are entirely different.
While a plurality (44%) of Democrats are politically liberal, nearly as many (35%) are moderate. So Democrats must make compromises within their party before reaching out. Also, the pool of available non-Democrats is very heavily on the moderate side.