Complex sentence: After Clay's defeat in the presidential election of 1844, Brownlow was grief-stricken, and when the party snubbed Clay in favor of Zachary Taylor in 1848, Brownlow called on Whig electors to vote for Clay instead.
Split into simpler sentences: After Clay's defeat in the presidential election of 1844, Brownlow was grief-stricken. When the party snubbed Clay in favor of Zachary Taylor in 1848, Brownlow called on Whig electors to vote for Clay instead.