In the video of his statement Trump says that gas "hit" 1.98 in a "couple" of states[/url]. He does not say "a lot of states", so this quote they gave us which allegedly comes from Trump is a lie as well.
Nope.
This is the video where he says it
https://www.youtube.com/watch?v=nn1Fr4dtRZU
Very clearly says "a lot of states", so please retract that accusation.
Even this version of the claim is deceptively edited. Here is the
full video: 34:48
Your energy your car your gasoline and they have three states this week a
couple of days ago that were $1.98 a gallon So gasoline prices are down by
a lot Energy prices are down Mortgage
36:15
prices down Every price has gone down What am I going to do i mean think of it Gasoline was almost $4 not so long ago. And now Mike we just hit 1.98 in a lot of states Think of it
Less than two minutes beforehand he says it is in "three states". The BBC clearly wanted to do some creative editing and remove that part. Obscuring this part and only showing the later sentence and pretending that he is talking about a majority of 50 states makes it a lie. The journalists at the BBC are liars and have no journalistic integrity.
As usual, the opposite is true. If someone promises to bring down the price of something and the average price goes up then they haven't kept that promise. Even if the price at one or even a handful of gas stations is as low as he claims, it's a dishonest representation to take the minimum price you can find and use that as evidence that you kept your promise when the average has gone up.
Replace gasoline with womens purses in your argument and you will see how poor that argument is. Gas is often sold at a premium with psychological tactics at a central shopping or food convenience area, strategic waypoints, or more commonly simply because it's sold in middle or upper class areas at a price calculated to what the market will bear and is willing to psychologically pay. The goal of companies is to sell at the highest possible price. Therefore the lowest prices of gasoline tells us more about the the cheapest viable product and cuts out market factors and companies trying to capitalize on gasoline.
According to Gas Buddy, Texas is now down to $1.97 a gallon for E85 type fuel in Waxahachie, TX , and $1.99 a gallon for UNL88 type fuel in Greenville, TX, with the lowest Regular type at $2.14 in Cleveland, TX.

From the maps we can see that the lowest costs are concentrated on the east side of Texas. These are prices around what Trump claimed. Gas is cheap in multiple cities in Texas on the east side, yet is more expensive in other Texas cities.
In the California coastal cities the price of gas is dollars more per gallon than the rest of the country, but we know that gas is "really" at the price of the states where it is lowest, specifically if we are trying to use the number as a gauge of the health of the economy as a whole and not the complex markets of rich Californians. Minimum gas prices affects transportation, industry, and a whole host of fields which capitalize on wholesale fuel. Maximum and average gas prices, not necessarily so.
Trump is using gasoline as a national indicator of health, and so the lowest prices in the country should be used. Since Trump has additionally pointed out that this is occurring in three different states it also strengthens the argument that this number is not a localized phenomenon and represents the optimized minimum viable product.