Republicans at the beginning of the 21st century akin to Federalists at the beginning of the 19th
I've heard that the Republicans were becoming the Whigs of the 21st century in some circles.
NOTHING COULD BE FURTHER FROM THE TRUTH.
The proper analogy would be to the Federalists who, after John Adams lost in 1800 and left the presidency in 1801, became a freakishly weird party with even weirder ideas that became nothing but a regional minority party and eventually died out.
For decades afterwards, the political division on a national level was entirely party politics within the Democratic-Republican party that eventually had a schism between the Jackson faction and the (John Quincy)Adams faction, eventually splitting into the Democratic and Whig parties.
The Whigs had their own divisions which led to their demise and the rise of the Republicans.
But as far as comparisons go, the Republicans of today are much more comparable to the Federalists of about two centuries ago.