Final answer:
If Candidate A wins Florida, they would secure the presidency by surpassing the needed 270 of 538 electoral votes, reaching a total of 273.
Step-by-step explanation:
If Candidate A has 244 electoral votes and wins Florida, with its 29 electoral votes as of the most recent elections, the new total would be 273 electoral votes (244 + 29 = 273). This would indeed secure the presidency since a candidate needs a majority of the 538 electoral votes to win, and the majority is 270 electoral votes. It's important to understand that within the Electoral College system, most states have a winner-take-all rule for electoral votes except for Nebraska and Maine, which allocate some of their votes by congressional district.